International Sharing School vs Oeiras International School

	I International Sharing School Lisbon, Portugal	O Oeiras International School Lisbon, Portugal
Snapshot	Snapshot
Fees / year	Fees / year €11,790 - 26,760	Fees / year €14,962 - 24,844
Age range	Age range 1 - 18 years	Age range 6 - 18 years
Type	Type Co-educational	Type Co-educational
Curriculum	Curriculum IB (PYP), IB (MYP), IB (DP)	Curriculum IB (PYP), IB (MYP), IB (DP)
Pupils	Pupils 600	Pupils 463
Typical class size	Typical class size 20	Typical class size 16
Instruction language	Instruction language English	Instruction language English
Opened	Opened 2019	Opened 2010
Bus service	Bus service No	Bus service Yes
Essentials	Essentials
Location	Location Av. Dr. Mário Soares 14, Porto Salvo, 2740-119 Portugal.	Location Oeiras International School is located in Oeiras, Portugal, on land leased from the municipality. Oeiras is about 15 minutes by car from Lisbon and the Lisbon airport.
Stages	Stages Foundation and Early Years; Primary Years Programme; Middle Years Programme; Diploma Programme.	Stages Primary Years Programme (Age 5-11), Middle Years Programme (Age 11-16), Diploma Programme (Age 16-19).
School type	School type —	School type Oeiras International School is a non-profit Association (OIS, ASFL) founded by parents and is an International Baccalaureate World School.
Pupil nationality mix	Pupil nationality mix Students from 51 nationalities learning together.	Pupil nationality mix Nationalities represented: 48+.
Additional learning support	Additional learning support —	Additional learning support A learning support programme exists as part of OIS's inclusive IB World School approach. Applicants with severe emotional needs cannot be catered for.
Country affiliation	Country affiliation Portugal	Country affiliation —
Religious affiliation	Religious affiliation —	Religious affiliation —
School day structure	School day structure —	School day structure School buses arrive with students between 8:00am and 8:15am. Afternoon buses depart at 4:00pm and 5:30pm.
Bus service details	Bus service details —	Bus service details The School runs its own bus routes from Cascais, Estoril, Sintra, Parede and the Lisbon area.
Fees	Fees
Fee details	Fee details Application and enrolment fees - Application fee: EUR 200 (deductible from the Enrolment Fee). - Enrolment fee (one‑off, payable when a new student is accepted): EUR 1,200. - Renewal fee (payable annually for returning students; invoiced in February): EUR 600. Tuition fees by year group (2026/2027) — term and annual amounts - Foundations (Foundation 1 & 2): EUR 3,930 per term — EUR 11,790 per year. - Early Years (ages 3–5): EUR 4,240 per term — EUR 12,720 per year. - Grade 1: EUR 5,210 per term — EUR 15,630 per year. - Grade 2: EUR 5,570 per term — EUR 16,710 per year. - Grade 3: EUR 5,690 per term — EUR 17,070 per year. - Grade 4: EUR 6,170 per term — EUR 18,510 per year. - Grade 5: EUR 6,170 per term — EUR 18,510 per year. - Grade 6: EUR 6,470 per term — EUR 19,410 per year. - Grade 7: EUR 6,910 per term — EUR 20,730 per year. - Grade 8: EUR 7,005 per term — EUR 21,015 per year. - Grade 9: EUR 7,680 per term — EUR 23,040 per year. - Grade 10: EUR 7,770 per term — EUR 23,310 per year. - Grade 11 (DP1): EUR 8,560 per term — EUR 25,680 per year. - Grade 12 (DP2): EUR 8,920 per term — EUR 26,760 per year. Billing schedule and payment terms (2026/2027) - Invoicing and due dates for ongoing students: Term 1 invoiced 1 June 2026, due 1 July 2026; Term 2 invoiced 2 November 2026, due 2 December 2026; Term 3 invoiced 1 March 2027, due 1 April 2027. Renewal fee invoiced 1 February 2027, due 26 February 2027. Examination fees invoiced 1 June 2026, due 1 July 2026. - New‑student payment schedule: application fee paid on submission; enrolment fee paid when the student is accepted; 50% of the tuition for the first term the student will join is payable with the Enrolment Fee to secure the place; remaining fees then follow the standard schedule. - Invoicing frequency: families may be invoiced either termly or annually according to preference. Annual invoices may attract a payment discount (see Discounts). All invoices must be paid net of bank charges. Cash payments are not accepted. - Late payments: 5% monthly compounded fine on overdue payments; legal fees for recovery of debt may be charged to the debtor. Students with outstanding debts may have limited access to optional services and their renewal for the following year may not be processed. No debt may be carried into the next academic year. Boarding - Not applicable: there are no boarding fees listed for the Taguspark/Lisbon campus. The school operates as a day school; boarding provision is not in effect for the Lisbon campus. Other mandatory and regular additional costs - School meals (optional service): EUR 700 per term; school meals are not included in the tuition and are invoiced with Term 1 fees. The meal plan includes a three‑course lunch and two snacks per day. - School bus (optional service): EUR 1,200 per student per term. School bus tracking app: EUR 45 per student (annual fee). The school bus service is subject to a one‑term commitment; withdrawals before the end of a term do not entitle a refund. - Yearbook: EUR 32 (issued with Term 1 fees). Annual insurance: EUR 28 (issued with Term 1 fees). Examination fees and other specified items are invoiced as noted in the payment schedule. - After‑school activities and clubs: some clubs are included in tuition; others are optional and charged separately. Optional activities are subject to a one‑term commitment and are non‑refundable if withdrawn before term end. An example listed for Diploma extracurricular charge: EUR 203 (indicative). One‑to‑one Inclusion Team support is charged when required and determined case‑by‑case. - Student card replacement fee (MYP/DP): EUR 10 if lost. Late pick‑up fees: EUR 100 per term per student (or a one‑time EUR 10 per day if not enrolled in the termly late‑pick up option). Uniform costs - Welcome pack (required for new students; prices by division): Early Years / PYP welcome pack: EUR 185; MYP / DP welcome pack: EUR 270. Physical & Health Education equipment pack: EUR 95. Individual uniform item prices: polo shirt EUR 25; T‑shirt EUR 15; hoodie EUR 40; jacket EUR 50; hat EUR 18; house T‑shirt EUR 20; PHE items (T‑shirt EUR 15, shorts EUR 15, trousers EUR 25, hoodie EUR 40). If a student arrives without correct uniform, a replacement will be provided and invoiced at the listed price. Refund and withdrawal rules - Notice of withdrawal: parents/guardians must notify the school in writing by email one full term before the student's intended departure. Specific notice deadlines to leave at the end of each term for 2026/27 are: to leave at the end of Term 1 — notice before 30 September 2026; end of Term 2 — before 4 January 2027; end of Term 3 — before 12 April 2027. Failure to provide required notice will result in charges for the subsequent term. - Non‑refundable items: the Enrolment Fee, the Application Fee and any payments made to the school are stated as non‑refundable under any circumstance. Optional service fees (bus, after‑school activities) are subject to the one‑term commitment and withdrawals before end of term do not entitle a refund. Temporary suspensions or permanent expulsions do not entitle any refund. Payment options and bank details - Accepted payment methods: bank transfer (specify student name/number on transfer), debit/credit card payments accepted in person at the school office (Visa and Mastercard), and approved educational vouchers (Edenred, Coverflex, Ticket). Cash payments are not accepted in line with Portuguese legislation. - Bank details for transfers (as provided for payments): Bank Name: Millennium BCP; Beneficiary: ISS‑OEIRAS; IBAN: PT50 0033 0000 4530 8575 3560 5; BIC/SWIFT: BCOMPTPL. All fees must be received net of bank charges. Discounts and concessions - Sibling discount on tuition: 10% for two siblings; 15% for three siblings; 20% for four or more siblings. A 5% discount applies to the second and subsequent siblings on the school bus fee. Discounts are void if fees are not paid according to the published payment schedule. - Annual payment discount: 3% discount on annual tuition fees if paid in full by 1 July 2026 (annual invoice must be fully settled by that date to retain the discount). (Information above reflects the published tuition and terms for the 2026/2027 academic year.)	Fee details Application and Registration Fees - Application fee (one-time, paid at application): €250. - Registration fee (one‑time, payable on enrolment according to the schedule below): amounts vary by year group (see Tuition by year group). The registration charge is non‑refundable. Tuition fees (per term and per year, by year group) - Years 1–4 (Pre‑PYP and PYP 1, 2 & 3): Registration €1,355; Term €4,064; Annual €13,547. - Year 5 (PYP 4): Registration €1,413; Term €4,238; Annual €14,127. - Year 6 (PYP 5): Registration €1,683; Term €5,049; Annual €16,830. - Years 7–9 (MYP 1, 2 & 3): Registration €1,799; Term €5,396; Annual €17,987. - Years 10–11 (MYP 4 & 5): Registration €2,127; Term €6,382; Annual €21,273. - Year 12 (DP 1): Registration €2,171; Term €6,514; Annual €21,713. - Year 13 (DP 2 — two terms only): Registration €2,171; Term €9,771; Annual €21,713. Additional one‑off and recurring fees - Capital levy (one‑time, non‑refundable for new entrants): one new student €5,000; two siblings starting in the same year €7,500; three or more siblings starting in the same year €8,500. Current families enrolling a new student receive a 10% discount on the capital levy. - Annual insurance per student: €20. - Yearbook (per family): €40. - Examination charges: Year 11 IB‑MYP assessment €900 (billed with Term II); Year 13 IB‑DP assessment €900 (billed with Term II). Transport and Meals (charged separately, invoiced per term) - School transportation (invoiced per term): one way €525; two ways €840. - School meals (invoiced per term; price per meal): €6.30 per day (includes soup, salad, a main course, dessert/fruit and a low‑sugar drink). Discounts and fines - Sibling discounts on tuition term fees: second child 5%; third child 15%; fourth child and subsequent children 25%. Annual tuition paid in advance before the posted deadline receives a 2.5% discount (deadline is communicated by the school). Discounts apply only to term fees and are annulled if fees are not paid on schedule. - Fines and charges: damaged or unreturned library books charged at replacement cost plus a 15% surcharge; lost team equipment €100; lost student card €5. Late payments incur legal taxes of 4% and may lead to suspension of services. Billing schedule and payment terms - Fees are invoiced by term. Payment deadlines: Registration by February 1; Term I by July 1; Term II by December 1; Term III by April 1. Termly fees are payable within 30 days of invoice. Further delay may result in suspension of services and legal late charges. Refunds and withdrawal notice - The registration charge is non‑refundable. Once registration is completed the student is deemed enrolled; if a registered student does not attend, Term I fees remain payable. The school requires one term's written notice to the Principal for withdrawal; without this notice the corresponding term fees remain due. Boarding - Boarding is not offered; the school operates as a day school. Accepted payment methods and payment details - Bank transfer (details provided by the school; ensure transfers are made net of bank charges and the student's name is given to allocate funds). IBAN and BIC/SWIFT details are used for euro payments. - Payment by check is accepted (payable to Oeiras International School ASFL). Other notes on fees - Application fee is a one‑time mandatory administrative charge for applicants. Capital levy and registration charges are one‑time entry costs and are non‑refundable. Certain exam and event charges are billed with specific term invoices as noted above.
Diving deeper	Diving deeper
Boarding arrangements	Boarding arrangements —	Boarding arrangements —
Uniform requirement	Uniform requirement ISS Lisbon has a school uniform. Uniforms can be purchased directly from the school. The uniform items include: EY T-shirt (soft white, EY-specific); Polo Shirt (white); Hoodie (grey); Winter Jacket (electric blue); Hat (black); Bucket Hat (dark blue); Sports T-Shirt; Sports Hoodie; Track Pants (dark blue); Track Shorts (dark blue).	Uniform requirement The school uniform is required for all students in Years 2 to 11. Everyday uniform for Years 2-11 includes grey trousers or skirt, white polo shirt, grey socks or tights, all black shoes, a light blue jumper, a grey hoodie, a blue fleece, and outerwear as needed. The P.E. uniform, or team uniform and tracksuit, is compulsory for all sporting activities and travel to events; House T-shirts are worn only for House activities.
Food options	Food options School meals are provided on-site by Thomas Franks; lunch is served, with healthy snacks mid-morning and mid-afternoon. The menu includes fish, meat and vegetarian options. The kitchen is nut-free and accommodates dietary requirements; meals are designed to promote focus, energy and wellbeing.	Food options Healthy meals are provided daily through Origem, with vegetarian and vegan options; menus include soup, salad, a main course (meat, fish or vegetarian), fruit or dessert, and a low-sugar juice or water. Microwaves and picnic areas are available for meals brought from home, and an on‑campus coffee shop offers snacks and Portuguese treats.
House system	House system Each student belongs to one of four houses: Red Sharks, Green Sharks, Yellow Sharks and Purple Sharks. Houses compete in academics, sports and creative events; prefects lead events and help integrate new students.	House system On joining OIS, families are assigned to one of four Houses—Kingfisher, Phantom, João Baptista or Vulpes. There are house competitions in sport, arts and academics, with points contributing to the end‑of‑year House Trophy.
Governance and ownership	Governance and ownership ISS Lisbon is governed by a Board of Governors that works with the Principal and Senior Leadership Team to guide long-term strategic goals. Governors focus on strategy, oversight, safety, wellbeing, and school improvement, reflecting the governance approach used across the Dukes Education family.	Governance and ownership Oeiras International School (OIS, ASFL) is a not‑for‑profit association founded in 2009 by 30 parents and associates. The Board, elected by the Associates, oversees governance; the school reinvests revenue into facilities and staff as there are no owners or shareholders.
Academics	Academics
Curriculum details	Curriculum details IB Continuum taught in English from Nursery to Grade 12, including Early Years Programme, Primary Years Programme, Middle Years Programme, Diploma Programme and IB University Prep. The curriculum is inquiry-based and cross-disciplinary with specialist teachers in arts, languages, STEAM and outdoor learning.	Curriculum details OIS offers the International Baccalaureate Continuum: Primary Years Programme (PYP) for ages 6 to 10 (PYP1 to PYP5), Middle Years Programme (MYP) for ages 11 to 16 (MYP1 to MYP5), and Diploma Programme (DP) for ages 17 to 18 (DP1, DP2). The school is an IB World School authorised to offer PYP, MYP and DP. PYP is an inquiry-based learning programme for children aged 6 to 10. MYP builds on prior learning and leads to the MYP certificate. The DP is internationally recognised for university admissions.
Student teacher ratio	Student teacher ratio Maximum class size is 20 students; EY and PYP classes have two teachers per class in addition to subject specialists.	Student teacher ratio 1:6 teacher to student; average class size 16.
Exam results	Exam results IB Diploma Programme results: average score of the top 40% students in 2025 was 36; the highest DP score achieved by ISS was 45/45; DP average score in 2025 was 32. University destinations include admission to over 40 top universities worldwide. University and careers counselling are provided, with weekly sessions during the DP and a Future Pathways Programme to guide transitions from MYP to DP and beyond; Dukes Plus offers additional university and careers support.	Exam results IB Diploma Results show high achievement. In 2021, 45 DP candidates with a 100% pass rate and an average DP grade of 5.6; OIS average points were 35, compared with a world average of 32.98. In 2020, 29 DP candidates with a 93% pass rate and an average grade of 5.12; OIS average points 32 versus world average 31.3.
Higher education progression	Higher education progression Graduates pursue higher education at over 40 top-tier universities worldwide. The school provides weekly sessions with the careers counsellor during the Diploma Programme and structured guidance through the Careers and University Counselling Team; the Future Pathways Programme supports transitions from the MYP to the Diploma Programme and beyond; there is collaboration with Dukes Plus for university and careers support.	Higher education progression Graduates go to universities around the world, including notable destinations in the UK, the USA and other countries such as King's College London, University College London, Imperial College London, Stanford University, University of Chicago, McGill University, University of Toronto and the University of Auckland.
Gifted and talented	Gifted and talented —	Gifted and talented —
Academic calendar	Academic calendar —	Academic calendar —
Wellbeing & support	Wellbeing & support
Social & emotional learning	Social & emotional learning The school provides a holistic education that develops the whole child socially, emotionally, and physically. The Primary Years Programme teaches in English and prioritizes language acquisition and development as part of its holistic approach. The Middle Years Programme supports personal, social, and emotional wellbeing alongside academic progress. The MYP features the Sharing Star Programme, a signature element that reinforces learning through sharing and social development. Wellbeing is placed at the heart of learning across ISS Lisbon.	Social & emotional learning Belonging, inclusion, and physical and emotional safety are foundational to learning at OIS. The Behaviour Policy aligns with the IB Learner Profile to guide respectful interactions and everyday practice. The school provides equal education opportunities and a non-discriminatory environment. A safe, caring environment supports students' social and emotional development.
Special educational needs (SEN)	Special educational needs (SEN) Learning Diversity and Inclusion Policy guides the school's approach to supporting diverse learners. Differentiated teaching ensures every student receives the support and guidance needed to thrive academically and personally. The Inclusion and Psychologists team provides wellbeing and academic support to students. ISS Lisbon fosters an inclusive environment where students with a range of needs can participate and progress.	Special educational needs (SEN) A learning support programme exists as part of OIS's inclusive IB World School approach. Applicants with severe emotional and intellectual needs cannot be catered for.
English as an additional language	English as an additional language The school teaches in English and emphasizes language acquisition and development. An English Language Acquisition Teacher and a Pastoral Team support EAL learners. Admissions include an English language assessment as part of the process. Language development is embedded across the curriculum in the IB programmes.	English as an additional language The language of instruction is English. Portuguese and English are core languages studied. German, French, Spanish and Mandarin Chinese are offered as first languages and as language acquisition options. In the MYP, language acquisition is taught for three lessons per week. All potential students undertake an English placement test to determine language development.
Mental wellbeing	Mental wellbeing Wellbeing is placed at the heart of learning at ISS Lisbon. The Middle Years Programme explicitly supports personal, social and emotional wellbeing alongside academics. The PYP emphasises nurturing the whole child, including social and emotional learning. The Inclusion and Psychologists team provides ongoing wellbeing and personal growth support for students.	Mental wellbeing Wellbeing is a central focus, with Wellbeing Awareness Year celebrating wellbeing topics monthly and involving school psychologists in talks on resilience and mental health. One Tribe Week explicitly focused on belonging and mental health, with mixed-age activities and staff support. Tutors, teachers, the nurse, student support and the psychologist are available to help as needed.
Safeguarding	Safeguarding ISS Lisbon is committed to safeguarding and promoting the welfare of children and young people. Staff are expected to be proactive about health and safety and to maintain a safe classroom environment. School trips are conducted with safeguarding standards to protect students. Safeguarding is embedded in the school's policies and everyday practice.	Safeguarding The school protects the rights of all children, following Portuguese law and the United Nations Convention on the Rights of the Child. A Child Protection and Safeguarding Policy guides how safeguarding concerns are handled, with mechanisms to react and respond if abuse is noticed or reported.
Safeguarding policy	Safeguarding policy —	Safeguarding policy —
Facilities	Facilities
Facilities overview	Facilities overview ISS Lisbon is housed on a two-building campus with separate primary and secondary facilities to foster community while keeping year groups together. The learning spaces are designed to support inquiry‑based learning and collaborative work, including Mountain Top for lectures, Cave for independent study, Campfire for group work, Watering Hole for social learning, Hands‑On for practical exploration and Movement for active learning. The campus is located in the Oeiras region of the Lisbon metropolitan area, surrounded by nature and near a cultural centre. This location also allows for experiences and excursions across the region, with Lisbon and Cascais about a 20‑minute drive away.	Facilities overview The Quinta is the main campus, a 17th-century Portuguese farm with a river, woodlands and green spaces. The Palace houses the library, science labs, and art and music rooms. The Pavilion contains exam classrooms, and the White/Orange Building includes the assembly area, a small gym, classrooms, staff rooms, a cafeteria and computer labs. The PYP building hosts Years 2–4, and campus gardens grow food for social projects while resident goats, donkeys and bees are part of the farm. There is a swimming pool on site, and future plans include a science and technology suite and a purpose-built PYP block. Outdoor spaces include a basketball court, football pitch and a multisport pavilion.
Sports facilities	Sports facilities —	Sports facilities There is a basketball court, a football pitch and a multisport pavilion. A swimming pool is on site. The campus offers tracks for mountain biking, as well as skateboarding and rollerblading. A cross-country course hosts inter-school tournaments.
Academic facilities	Academic facilities The campus includes a set of dedicated learning spaces designed for varied modes of learning, including Mountain Top, Cave, Campfire, Watering Hole, Hands‑On and Movement. Mountain Top is used for lectures and briefings, Cave for independent work, Campfire for collaborative dialogue, Watering Hole for social learning, Hands‑On for practical exploration and Movement for physical activity. The two-building arrangement groups primary and secondary cohorts in close proximity to support project‑based inquiry and smooth transitions between ages. ISS Lisbon offers the International Baccalaureate in English from Nursery to Grade 12, integrating these spaces into an IB curriculum across all years.	Academic facilities The Palace houses the library, science labs, and art and music rooms. The Pavilion is the latest building with several classrooms. The White/Orange Building contains the main assembly area, a small gym, classrooms, staff rooms, a cafeteria and the computer labs.
Extra curricular facilities	Extra curricular facilities The After School Activities Programme is inclusive and provides experiences across arts, music, science and sports. Activities are not included in tuition and fees are charged per term. A wide range of activities is offered, including 3D Modeling & Programming, Art, Basketball, Climbing, Football, Rugby, Sailing, Surf, Swimming, Padel, Judo, Robotics, Photography and more. Times and availability vary by activity and term.	Extra curricular facilities Co-Curricular Activities run on Wednesdays (MYP) and Thursdays (PYP) with choices that change each term. Learn-to-Swim uses the Barcarena pool. CCAs include Robotics, Game Development, Arts Therapy, Mix It Up, Board Games, Ceramics, Multi Sports, Skateboarding, Yearbook Club, Parkour, Entrepreneurs' Club, Percussion, Journalism/Valley Times and School Production.
Parent experience	Parent experience
History	History ISS Lisbon is part of the Dukes Education family of nurseries, schools, and colleges across the UK and Europe. Dukes Education was founded in 2015 by Aatif Hassan. Being part of the Dukes Education family gives ISS Lisbon the strength of a close-knit educational community while preserving its own identity, character, and culture. Dukes Education Across Europe shows growth, including in Portugal where ISS Lisbon partners with sister schools within the Dukes Education family to share professional development and collaborative initiatives.	History Moved to Barcarena, Oeiras in September 2011, Oeiras International School is housed in the Quinta de Nossa Senhora da Conceição, a 17th-century estate built by João Baptista Sinel de Cordes. The Sinel de Cordes family coat of arms is visible at the main gate. The property remained in the family until 1969 when it was sold to a Belgian, later becoming part of the Oeiras Council estate and ultimately the home of OIS. OIS is committed to nurturing a learning community to shape a sustainable world.
Community	Community ISS Lisbon hosts a global, multicultural community with students from 51 nationalities and a multilingual staff. The house system connects learners across ages, and student voice is represented through the Student Council, Student Action Group, and dozens of student-led clubs. Parents are partners, with a parent committee, parent-teacher forums, and a 'Champions of the School' group ensuring their input is heard and valued. Regular social events and involvement in activities such as volunteering at the Dukes Festival of the Arts, and connections with other families through the Dukes Foundation, foster a sense of belonging.	Community Oeiras International School has an active community with Alumni, Student Houses, Uniform, Co-curricular Activities, and a Student Council, plus a broad After-School Activities (ASA) program offering music, arts, sciences and sports. The ASA program includes a Camp Go outdoor-education partnership to provide hands-on experiences outside the classroom. The school's Parents Club coordinates social and cultural events, including coffee mornings, cultural trips, Winter Wonderland, Arraial and Halloween, as well as fundraisers and wellness activities for families.
Parent teacher association	Parent teacher association The parent committee, parent-teacher forums, and 'Champions of the School' group provide channels for parent input and partnership with ISS Lisbon. Regular social events help globally-mobile families feel at home from day one. Parents volunteer at events such as the Dukes Festival of the Arts. Families connect with other families through the Dukes Foundation. ISS Lisbon supports parent involvement through formal and informal parent groups.	Parent teacher association The school has a Parents Club run by parent volunteers, which organizes social and cultural events, coffee mornings, cultural trips, family events such as Winter Wonderland, Arraial and Halloween, bake sales and fundraisers, and monthly cultural trips. The school also has a Parent Council, introduced in early 2023 to provide a representative voice for parents and guardians, and to partner with teachers and school leadership. The Parent Council operates the OIS Community Portal for proposals; its mission is to strengthen communication, provide mentorship opportunities, and create community-driven solutions. Representatives are elected annually to ensure a diverse and inclusive team.
Extra-curricular	Extra-curricular
Academic & intellectual	Academic & intellectual The After School Activities Programme in Lisbon offers a wide range of academically oriented experiences that extend learning beyond class. It includes 3D Modeling & Programming, Game Development with AI, Python with AI, Robotics, and Business MiniGames, alongside Maths Club I/II and Homework Club I/II. These activities develop critical thinking, problem solving and coding skills through inquiry-based formats. Fees are per term and vary by activity.	Academic & intellectual The school offers a range of co-curricular activities that develop academic and intellectual skills, including Robotics and Game Development, as well as Journalism/Valley Times and the Yearbook Club. PYP CCAs include Arts Therapy, General Motor Skills, Mix it Up, and Learn-to-Swim, while MYP CCAs include Art Club, Entrepreneurs' Club, Percussion Club, Parkour, Journalism, Multi-Sports, School Production, Skateboarding, and Yearbook Club. The Duke of Edinburgh Award provides a structured program focusing on volunteering, physical activity and skills, with expeditions, and OIS participates in Model United Nations activities.
Arts & creative	Arts & creative Artistic and creative programmes are offered after school, including PYP Art, MYP/DP Art, Graffiti, Photography, Music Academy, and Musical Theatre. Dance Ballet and Dance Modern & Jazz develop technique and musicality, while Prop & Design and Script Writing support theatre and storytelling. Musical Theatre combines acting, singing and dancing for vibrant performances. Some activities are included in the clubs programme and others may carry separate fees.	Arts & creative Arts-focused activities include Arts Therapy, Ceramics, Film Making & Creative Writing, Art Club and School Production. Sewing Club, Creative Jewellery Club, and Strings Club are also offered as part of the ASA program, along with a range of music-related sessions.
Cultural & language	Cultural & language Russian Literature is offered, and Russian for Native Speakers is available. Portuguese Storytelling supports language development and bilingual experiences. Russian language offerings include beginner and literature-focused activities for interconnected language learning.	Cultural & language English and Portuguese are core languages; German, French, Spanish and Mandarin Chinese are offered as additional language options both as first language and language acquisition. Global citizenship and intercultural learning are integrated into OIS's approach, with wellbeing, ethics and respect for diverse contexts. OIS participates in Model United Nations activities, including COP Oeiras Valley simulations and MUN conferences.
Social & hobbies	Social & hobbies Clubs and hobby groups foster social interaction and personal interests, including Fun Lego, Storytelling, Reading Club, Homework Club, Maths Club and various arts and sports activities. Students can pursue passions through Music Academy, Debate Club, Musical Theatre, Photography and other creative outlets. Our clubs are included in tuition fees at ISS Taguspark.	Social & hobbies The After-School Activities (ASA) and Musical Instrument Lessons (MIL) program offers a wide range of pursuits across music, arts, sciences, life skills and combat sports. Current ASA activities include Instrument Clubs, Arts Therapy, Board Games, Ceramics, Film Making & Creative Writing, Robotics & Beyond, Surfing, Skateboarding, OIS Orcas Swimming Academy, and more. Registrations open after the ASA Fair, with a late bus available for eligible students.
Community & service	Community & service Student Council provides leadership experience by teaching about UN SDGs and taking action to make the school community more sustainable. Student trips extend learning beyond the classroom, including mountain expeditions, theatre trips and sports fixtures. The School House system promotes belonging and teamwork within the community.	Community & service The Student Council emphasizes service and charity, organizing food bank collections, fundraising and community events. The council engages in school-wide social events and campaigns, and funds improvements for the school community as needed.
Leadership & professional	Leadership & professional Leadership is encouraged through the pastoral curriculum, mentoring, and opportunities to take on leadership roles, developing an entrepreneurial mindset. The School House system promotes teamwork and collaboration across year groups. The Student Council and other activities help students learn governance, collaboration and professional communication skills.	Leadership & professional The Duke of Edinburgh Award offers Bronze, Silver and Gold levels focusing on volunteering, physical and skills, with expeditions. Leadership is also developed through the Student Council, sports captains, House Captains and Head Students, with annual elections to select student leaders.
Lifestyle & wellbeing	Lifestyle & wellbeing Wellbeing is central to ISS, nurturing emotional, social and physical wellbeing to support academic success and overall growth. The Wellbeing Team includes a Pastoral Team, Inclusion Team, a Psychologist and Nurses. The pastoral curriculum emphasizes life skills, mentoring, leadership and resilience, and supports safeguarding and online safety as part of a structured wellbeing programme.	Lifestyle & wellbeing Sports are a core part of OIS, with competitive and non-competitive activities and participation in CHESS and ISSA leagues; offered sports include football, volleyball, basketball, and cross-country. Physical and Health Education is integrated into the MYP curriculum, and the Diploma Programme offers Sports, Exercise and Health Sciences as an option. The Quinta grounds provide space for recreational activities, trekking tracks, skating, and inter-school tournaments.
Language provision	Language provision
Language provision	Language provision The school uses English as the language of instruction across the IB programmes from Nursery to Diploma. Portuguese is taught as a language; in the Primary Years Programme, language instruction is delivered in English. In the Middle Years Programme, Language & Literature covers English and Portuguese, while Language Acquisition includes English, Spanish, Portuguese, and French. In the Diploma Programme, Language & Literature offerings include English A, English B, Portuguese A, Portuguese B, and Language Acquisition includes Portuguese B, French B, Spanish B, and French ab initio, with Russian A: Literature also offered. Foundations and Early Years include Portuguese taught by a specialist. ISS Lisbon is a multilingual and multicultural setting with students from more than 50 nationalities.	Language provision Portuguese and English are core languages; they are taught as first language or Language and Literature in IB terms. German, French, Spanish and Mandarin Chinese are offered as first language and for language acquisition. Most students study three languages, with the level of study matched to fluency rather than age. In the MYP, language acquisition is taught for 3 lessons per week.
Bilingual teaching	Bilingual teaching The school teaches in English. Portuguese is taught as a language, and the IB curriculum supports multilingual learning across levels.	Bilingual teaching Portuguese and English are core languages; in IB terms they are Language and Literature or first language. German, French, Spanish and Mandarin Chinese are offered as first language and for language acquisition. Most students study three languages.
Immersion programs	Immersion programs —	Immersion programs —
Reputation	Reputation
Awards	Awards —	Awards —
Accreditations	Accreditations —	Accreditations —
Admissions	Admissions
Admissions	Admissions Step 1: Send an enquiry. ISS offers an IB education for children aged 3-18. To begin the admissions journey, fill out the enquiry form. A member of the Admissions Team will respond with information for the next steps. The school is currently accepting enquiries for the Academic Year 2026-27 for all age groups. Step 2: Book a school tour. Families are encouraged to book a school tour to see ISS in action. Tours can be conducted in person or online. During the visit, a tour of the school is provided and the educational philosophy is explained. This step helps families understand the learning environment before applying. Step 3: Submit your formal application. Complete the application form and provide a recent report card. Pay the application fee. These materials initiate the formal review of the applicant. Step 4: Assessment / interview. After reviewing the application, families are invited to an interview. The child will undertake an English language assessment as part of the process. The admissions team will communicate the outcome of the assessment. Step 5: Confirmation of enrolment. If a place is offered, the family will be informed by the Admissions Team. Enrolment is confirmed only after payment of all required fees. The school will provide next steps and onboarding information after enrolment.	Admissions Students aged 5 to 18 may be admitted, with OIS beginning in Year 2 (PYP1) for typically 6-year-olds. The school is over-subscribed in most year groups, so applying early is advised. A placement test assesses cognitive ability and learning style; there is no pass or fail mark, and staff determine whether they can support the student, with the Student Support Department assisting if extra help is needed. Priorities for admission are: first current students, staff and founding/associate members; second siblings of current students; other applicants are considered as space allows; under equal conditions, offers go to the student with the best previous academic record. There is a learning support program, but applications with severe emotional needs cannot be catered for. Documentation and an interview are required. OIS accepts applications throughout the year (Rolling Admissions) if space becomes available. English language requirements vary by grade; a minimum level is advised, fluency is not compulsory for admission to certain year groups, and full proficiency is required for Years 10–13 and will be assessed during admissions. The admissions steps are: register your interest; complete the application form and pay the €250 application fee; schedule placement tests; attend an interview with the programme coordinator; Admissions Committee reviews the application; upon successful completion, upload the required documentation and pay the registration fee to secure the place; if there is no space, the applicant will be placed on the waiting list.
Scholarships	Scholarships —	Scholarships The school offers scholarships for outstanding students. Scholarships may be awarded to students who live or study within the Oeiras area who otherwise may not have the opportunity to benefit from an OIS education. Scholarships are awarded on merit by the Scholarship Selection Council and are weighted by need, with partial or full scholarships possible. They cover all yearly registration and fees and required educational activities, with no other discounts applied. Open to students ranked in the top 10% of their year (Year 7 through Year 12) who live or study in the municipality of Oeiras. Ten full scholarships exist, and automatic yearly renewal is based on continued high academic achievement and significant involvement in wider school activities. The online application must be submitted by 14 March at 17:00 and includes: a letter from the applicant's parents in English or Portuguese, a short video in English outlining why they wish to join OIS, the applicant's Curriculum Vitae, reports from the previous three years including grades, three recommendation letters (one from Head Teacher/Principal and two from current teachers), and a declaration from the Head Teacher/Principal that the applicant is ranked in the top 10%. The Scholarship Selection Council is composed of one representative from Câmara Municipal de Oeiras (CMO) and at least three OIS representatives. Submissions deadline for Academic Year 2026/27 is Closed.
Waitlist	Waitlist —	Waitlist If there is no available place, the applicant will be placed on the waiting list.
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