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Sønderborg International School

Denmark, Sonderborg

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Independently researched by doris.
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The school at a glance
Instructs in English, Danish
Fees DKK 20,350 - 32,025
Ages 3 - 16 years
Type Co-educational
Opened 2007
Bus Service No
Availability Not shared by this school
Academic offering
Curriculum Cambridge (Secondary), Cambridge IGCSE, British Curriculum, Bespoke Curriculum
Taught languages Danish, German
Strengths STEM, Outdoor Education, Languages
Clubs Arts and Creative, Cultural and Language, Leadership and Professional
Stages Kindergarten, Elementary, Middle School
Introduction

Sønderborg International School (SIS) is a Cambridge International School in Denmark offering a Cambridge-based path from Primary through Upper Secondary with a Nordic context. The campus serves pupils aged 3–16 across Primary (Year 1–4), Lower Secondary (Year 5–7) and Upper Secondary (Year 8–10). The curriculum blends Cambridge instruction with a bespoke Danish‑English program, small class sizes, and cross‑curricular learning that includes Forest School. In Upper Secondary, students pursue Cambridge IGCSE qualifications, studying English, Maths, Science, Global Perspectives, Danish, German, History and Business Studies, with Danish First Language available for native speakers. The school's Kindergarten, founded in 2016 in a private‑public partnership with Sønderborg Municipality, anchors early years in a wider community. Facilities include accessible academic spaces and opportunities to tour during Open School Day. Extracurriculars feature a Student Council, Career Week, and an After School Program, while Life Skills and experiential learning underpin daily education. A welcoming, globally aware community.

sischool.dk

Agervang 14, 6400 Sønderborg, Denmark

Vibes and Culture
The school has not added this information
The Essentials

Sønderborg International School has instruction in English, Danish.

Location
The school is located at Agervang 14, 6400 Sønderborg. The School, ASP, and Afternoon Club share this address on the Agervang campus. The campus is in Sønderborg, Denmark.

Stages
The school offers Kindergarten. The Cambridge Program provides primary through secondary education, including Cambridge Secondary 1 (11-14 years) and Cambridge Secondary 2 (14-16 years) with Cambridge IGCSE exams and Danish language exams.

Type
The school is a private foundation known as The International School of Sønderborg.

Additional learning support
The school is inclusive and focuses on the individual student. Learning supports English and Danish across reading, writing, listening, and speaking; by the end of primary and secondary programs students are expected to reach CEFR levels in both Danish and English, with language immersion programs for late entrants.

Country affiliation
Denmark

School day structure
Mon-Thu 08:00–15:00. Friday 08:00–14:30.
Diving Deeper
The school has not added this information
Fees

Annual tuition at Sønderborg International School ranges from DKK 20,350 to DKK 32,025 for 2026/27.

Application & registration fees
- Registration fee (one-off, non-refundable): DKK 600.
- Enrolment fee (one-off): DKK 2,500.

Tuition (school) fees — amount, billing and per-year calculation
- Monthly school fee (applies to day-school tuition): DKK 1,850 per child.
- Billing schedule: school fees are billed 11 times per school year; each payment is due in advance on the 1st of the month. Total annual tuition (11 payments): DKK 20,350 per child (DKK 1,850 × 11).
- Sibling discount: DKK 185 per month for the third child and onwards (applies from child number three).

After-school care, clubs and selected additional recurring charges
- After School Program (ASP) – monthly fee for Year 1–4: DKK 750.
- Holiday ASP – fee per week: DKK 500.
- Morning ASP (early care) — listed fee shown in the school's fee document.
- Afternoon Club / ASP for Years 5–10 — monthly fee shown in the school's fee document (DKK 750 listed in the current fee sheet).

One-off / other specified charges
- Safety equipment for science (Years 6–10): DKK 170.
- Yearly Parent-Teacher Committee (PTC) fee per child: DKK 175.
- Lost bus card: DKK 150.
- Administrative charge for failing to register for PBS (automatic payment service): an administrative charge (DKK 100 per payment) is applied if PBS is not used for collection.

Field trips and one-off activity costs
- Field trips are extra and budgeted by year group: maximum billed cost for a field trip should not exceed one monthly school fee for Years 1–6 and two monthly school fees for Years 7–10; field-trip costs are invoiced over two months where applicable.

Billing schedule and payment terms
- Frequency: fees are charged 11 times per school year and are due in advance on the 1st of each month. Families are urged to register for PBS (Denmark's automatic payment system) within six months of registration.
- Bank transfer details: the school provides bank account information (Broager Sparekasse) with Reg. No., Account No., IBAN and SWIFT for payment by bank transfer.
- If PBS is not used, an administrative charge applies; missed or late payments may incur reminder charges as listed in the school's published fee documents.

Boarding
- Boarding is not offered; the school operates as a day school with Kindergarten, After School Program and day-time curriculum only.

Uniforms and clothing costs
- There is no compulsory uniform fee item listed in the school's published fee documents and parent handbook; costs for personal clothing, sports kit or optional branded items are not specified as a compulsory fee in the school's fee schedule.

Refunds, withdrawal and related rules
- Registration fee: one-off and non-refundable.
- Withdrawal notice: parents must notify the school in writing; a minimum of one month's written notice at the end of a calendar month is required. School fees apply to the final month and the following month during the notice period. Official transcripts and transfer certificates are issued after de-registration procedures are completed and outstanding fees are paid.

Summary of common payment methods
- PBS (automatic direct-debit) — the school requests families sign up for PBS for automatic collection and applies administrative charges where PBS is not used.
- Bank transfer — IBAN and SWIFT details are published for direct bank payments to the school's account.

(Amounts are stated in Danish kroner: DKK. All recurring and one-off fees above are taken from the school's current published admission/registration and parent information documents.)
Academics

Sønderborg International School teaches Cambridge (Secondary), Cambridge IGCSE, British Curriculum, Bespoke Curriculum for students aged 3 to 16.

Curriculum
SIS offers education at three levels: Primary (Year 1-4), Lower Secondary (Year 5-7), and Upper Secondary (Year 8-10). The curriculum is holistic and delivered in small classes, with cross-curricular learning and options such as Forest School and the Cambridge IGCSE pathway. In Upper Secondary, students work toward IGCSE qualifications and study English, Maths, Science, Global Perspectives, Danish, German, History and Business Studies. Danish First Language is offered to students who speak Danish at mother tongue level, following the Ministry of Education's Fælles Me5l for Danish, with the final exam Folkeskolens Afgangsprf8ve for 9. Klasse. Modern Foreign Languages are included across levels.
Wellbeing
The school has not added this information
Parent Experience
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Facilities
The school has not added this information
Extra-Curricular Activities
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Languages
The school has not added this information
Reputation
The school has not added this information
Admissions

Admissions
How to register: Sønderborg International School is happy to assist with the enrolment process. To arrange an appointment or get more information, contact: email [email protected], telephone +45 74 43 01 10. Documents available electronically include: APPLICATION, CONSENT PHOTOS / VIDEOS, TRANSFER CERTIFICATE. Application Procedure: If you would like to place your child on the waiting list with a deferred start, use this process: 1. Complete the application form for each child. 2. Print and sign the application form on page two; signatures from both parents if they share custody. 3. Scan both pages and email to [email protected], or deliver to the mailbox outside the school. 4. Transfer the registration fee of 600.00 DKK per child. Bank details are provided in the Admission and Registration document. Documents you need to fill out to register: APPLICATION, CONSENT PHOTOS / VIDEOS, TRANSFER CERTIFICATE. Other documents: ADMISSION TO SIS, ADMISSION AND REGISTRATION, CAMBRIDGE - A GUIDE TO PARENTS. Leaving the School / De-registration Procedure: For de-registration, provide at least one month's written notice to the headmaster; school fees apply to the final month; return all school-books; Official transcripts and Transfer Certificates are issued upon request after de-registration and payment of fees.

Waitlist
If you would like to place your child on the waiting list with a deferred start, use the same application process described above.
School Events
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