Keystone International Schools vs MEF International School Istanbul

	K Keystone International Schools Istanbul, Turkey	M MEF International School Istanbul Istanbul, Turkey
Snapshot	Snapshot
Fees / year	Fees / year TRY 22,750 - 26,750	Fees / year TRY 23,610 - 42,915
Age range	Age range 3 - 18 years	Age range 3 - 18 years
Type	Type Co-educational	Type Co-educational
Curriculum	Curriculum Canadian Curriculum, IB (DP)	Curriculum IB (PYP), IB (DP), Cambridge (Secondary), Cambridge IGCSE
Pupils	Pupils 250	Pupils 400
Typical class size	Typical class size 18	Typical class size 6
Instruction language	Instruction language English	Instruction language English
Opened	Opened 2011	Opened 1998
Bus service	Bus service No	Bus service No
Essentials	Essentials
Location	Location Keystone International Schools operates in Istanbul, Turkey, with two campuses: Küçük Çamlıca Campus (Gülhan Sok. 1-2, Üsküdar, 34660) and Çekmeköy Campus (Süleymaniye Cd. No:20B, Çekmeköy, 34782). It also features a Toronto Campus as part of its Canadian program. The Istanbul addresses are the primary Turkish locations for Keystone.	Location Located in Ortaköy, Istanbul, on the European side, MEF International School, Istanbul sits near the city center. The campus spans 9 acres and shares facilities with MEF National School. The address is Ulus Mah. Leylak Sok. No:22, 34340 Ulus, Besiktas, Istanbul, Turkey.
Stages	Stages Kindergarten (Ages 3-6); Primary (Grade 1-6); Middle (Grade 7-9); High (Grade 10-12)	Stages Early Childhood Centre (Preschool through Kindergarten); Primary School (Grades 1–5); Middle School (Grades 6–12); High School (Overview, Cambridge IGCSE, IB Diploma Programme, and IB Certificate Programme).
School type	School type The school is a Canadian offshore school.	School type —
Pupil nationality mix	Pupil nationality mix —	Pupil nationality mix —
Additional learning support	Additional learning support —	Additional learning support Guidance Counseling; English Language Learning; Learning Support; Career Counseling; Overseas College Counseling.
Country affiliation	Country affiliation Canada	Country affiliation —
Religious affiliation	Religious affiliation —	Religious affiliation —
School day structure	School day structure —	School day structure —
Bus service details	Bus service details —	Bus service details Bus service for the 2025–2026 Academic Year is provided by Transay Transportation & Employee Services Co., a company operating in the transportation sector since 1989. Parents can register via the MEF IS School Bus Sign-Up Form. For inquiries, contact MEF IS bus liaison Ms. Derya Seyitoğlu at T: +90 549 171 75 11 or +90 212 275 30 03, E: mef@transay.com.tr or deryaseyitoglu@transay.com.tr.
Fees	Fees
Fee details	Fee details Application & registration fees - Canadian registration (mandatory, non-refundable): USD 1,750 per student per year. This fee is separate from tuition and is required for registration with the Prince Edward Island (PEI) Ministry of Education. Tuition fees (annual, by year group) - Kindergarten (ages 3–5): USD 21,000 per year. - Primary (Grades 1–6): USD 24,000 per year. - Middle School (Grades 7–9): USD 25,000 per year. - High School (Grades 10–12): USD 25,000 per year. Per-term (per-semester) amounts - The school operates on a two-semester academic calendar; present per-term figures below are the annual tuition divided by two (per semester). - Kindergarten: USD 10,500 per semester. - Primary (Grades 1–6): USD 12,000 per semester. - Middle School (Grades 7–9): USD 12,500 per semester. - High School (Grades 10–12): USD 12,500 per semester. Billing schedule and payment terms - Deposit at registration: 40% of the chosen tuition is due at registration. - Remaining balance: The remaining tuition balance may be paid in installments; the installment cycle begins at registration and must be completed by December of the academic year in question. The annual Canadian registration fee (USD 1,750) must be paid in full at registration. - Sibling discount: 10% for the second sibling; 5% for each additional sibling. - Early-payment discounts and specific installment deadlines are published with the fee schedule and may include reduced rates for full payment by designated dates. Boarding / residence - Keystone International Schools is a day school; no boarding fees apply. The school operates as a coeducational day school. Other mandatory or likely additional costs - Canadian registration (listed above) is charged separately and is non-refundable. - Books and learning materials: - Grades 1–6: students must purchase books sourced from Canada. - Grades 7 and above: a book-rental program is offered; rental textbooks are provided rather than individual book purchases. - Lunch and catering: - Lunch is included in the tuition for all students except high school; high school students may bring lunch, purchase from the school, or buy cafeteria food. The school operates an in-house fresh meals program. - Uniforms: Uniforms are required (regular days Monday–Thursday; Fridays are casual within the dress code) and PE uniform is required on PE days. Families must purchase required uniform items. (Uniform policy and expectations are set in school documentation.) - Transportation: Licensed school bus service is provided; a separate transport fee typically applies for bus users (transport procedures and safety are described by the school). - Assessments/exams: Standardized testing and examination fees such as MAP testing are included in quoted tuition. - Field trips and extracurricular activities: participation-related charges (trip fees, materials, external examination fees where relevant) may be billed in addition to tuition as needed; such items are handled on a per-event basis and according to school policy. Refund and withdrawal rules - Withdrawal prior to the start of the academic year: annual tuition is refunded less a 10% deduction from the annual tuition fee. - Withdrawal after the academic year begins: tuition and meal fees are prorated based on days attended; an additional 10% deduction from the annual tuition fee is applied when withdrawing after the academic year has started. Refunds follow the school's financial policy and the formal withdrawal procedure. Fee payment options and invoicing notes - The school's published materials reference installment billing (40% at registration with the balance on an installment schedule through December) and indicate that early-payment discounts have applied in prior schedules; common payment channels for schools of this type typically include bank transfer/wire and direct payment methods. Specific accepted payment methods (credit card, bank-transfer details, local payment rules and any merchant fees) and exact installment dates are provided by the school with the invoice and fee schedule. Summary of immediate charges at registration (typical) - First tuition installment (40% of the chosen annual tuition). - Canadian registration fee: USD 1,750 (non-refundable). - Any selected optional services billed upfront (for example, bus service or uniforms if the school invoices them at registration). All figures quoted above are stated in USD. For any specific student-level invoice items (transport route cost, uniform package price, book purchase total, or confirmed installment dates) the school provides itemised billing at registration and with the official fee schedule.	Fee details Application and Registration Fees - Application fee (one-time, non-refundable for new applicants): USD 1,250. - Registration fee (one-time, non-refundable for new applicants; for ECC students registration fee is paid when they start Grade 1): USD 4,250. Placement Fee (annual, secures the place for new and returning students) - Placement fees by year group (annual): - Early Childhood Centre (Pre‑School / Pre‑Kindergarten): USD 4,500. - Kindergarten: USD 6,000. - Primary School (Grades 1–5): USD 7,500. - Middle School (Grades 6–7): USD 7,500. - Middle School (Grade 8): USD 7,500. - High School (Grades 9–11): USD 7,500. - High School (Grade 12): USD 7,500. - IB Year 1 (IB‑1): USD 8,000. - IB Year 2 (IB‑2): USD 8,000. Tuition, Food and Annual Totals (Academic Year 2026–2027) — amounts shown in USD - Each line below shows: Tuition \| Food \| Total (including 10% VAT) \| Total (excluding VAT). - Pre‑School / Pre‑Kindergarten: Tuition USD 20,070 \| Food USD 3,540 \| Total (including VAT) USD 23,610 \| Total (excluding VAT) USD 21,463. - Kindergarten: Tuition USD 29,920 \| Food USD 3,540 \| Total (including VAT) USD 33,460 \| Total (excluding VAT) USD 30,418. - Primary School (Grades 1–5): Tuition USD 37,500 \| Food USD 4,100 \| Total (including VAT) USD 41,600 \| Total (excluding VAT) USD 37,818. - Middle School (Grades 6–7): Tuition USD 38,815 \| Food USD 4,100 \| Total (including VAT) USD 42,915 \| Total (excluding VAT) USD 39,014. - Middle School (Grade 8): Tuition USD 39,050 \| Food USD 4,100 \| Total (including VAT) USD 43,150 \| Total (excluding VAT) USD 39,227. - High School (Grades 9–11): Tuition USD 40,900 \| Food USD 4,100 \| Total (including VAT) USD 45,000 \| Total (excluding VAT) USD 40,909. - High School (Grade 12): Tuition USD 42,020 \| Food USD 4,100 \| Total (including VAT) USD 46,120 \| Total (excluding VAT) USD 41,928. - IB‑1: Tuition USD 41,065 \| Food USD 4,100 \| Total (including VAT) USD 45,165 \| Total (excluding VAT) USD 41,059. - IB‑2: Tuition USD 42,165 \| Food USD 4,100 \| Total (including VAT) USD 46,265 \| Total (excluding VAT) USD 42,059. Installment amounts and billing schedule (payment plan) - The placement fee is due immediately after confirmation of admission for new students; returning students must pay the placement fee by March 31, 2026 to secure re‑enrolment. - Tuition is payable in a 5‑installment plan after payment of the placement fee. The installment due dates for the academic year are: 31 March 2026 (placement or first due by date shown in schedule), then 15 May 2026, 15 July 2026, 15 September 2026, 15 November 2026 and 15 January 2027 (final installment). Specific installment amounts by grade are shown below. - Installment breakdown by year group (Placement Fee; then 1st — 5th installment amounts; all amounts in USD): - Pre‑School / Pre‑K: Placement Fee USD 4,500; Installments USD 3,822 \| 3,822 \| 3,822 \| 3,822 \| 3,822; Annual total USD 23,610. - Kindergarten: Placement Fee USD 6,000; Installments USD 5,492 \| 5,492 \| 5,492 \| 5,492 \| 5,492; Annual total USD 33,460. - Primary (Gr 1–5): Placement Fee USD 7,500; Installments USD 6,820 \| 6,820 \| 6,820 \| 6,820 \| 6,820; Annual total USD 41,600. - Middle (Gr 6–7): Placement Fee USD 7,500; Installments USD 7,083 \| 7,083 \| 7,083 \| 7,083 \| 7,083; Annual total USD 42,915. - Middle (Gr 8): Placement Fee USD 7,500; Installments USD 7,130 \| 7,130 \| 7,130 \| 7,130 \| 7,130; Annual total USD 43,150. - High School (Gr 9–11): Placement Fee USD 7,500; Installments USD 7,500 \| 7,500 \| 7,500 \| 7,500 \| 7,500; Annual total USD 45,000. - High School (Gr 12): Placement Fee USD 7,500; Installments USD 7,724 \| 7,724 \| 7,724 \| 7,724 \| 7,724; Annual total USD 46,120. - IB‑1: Placement Fee USD 8,000; Installments USD 7,433 \| 7,433 \| 7,433 \| 7,433 \| 7,433; Annual total USD 45,165. - IB‑2: Placement Fee USD 8,000; Installments USD 7,653 \| 7,653 \| 7,653 \| 7,653 \| 7,653; Annual total USD 46,265. Payment terms, invoicing and penalties - Amounts are required in US dollars; payments must be made to the school's USD bank account. Transfers are subject to bank charges; ensure the full USD amount is credited to the school. Email a copy of the bank receipt with the child's name and "26‑27 Child's name" to the Admissions email address upon settlement. Separate bank account details exist for IB DP tuition payments. - Bank account details (wire/SWIFT/IBAN for USD payments) are provided for the school's Yapi Kredi Bankasi account; the account holder is MEF Okullari ve Ozel Egitim Hizmetleri A.S. (full wire details and IBAN are provided with the school's payment instructions). - A 2% discount is available for payments made in full before March 6, 2026 (full payment discount deadline as stated). - Invoices: the annual school fee is divided into ten equal amounts (September–June) and e‑invoices are issued monthly by the school's billing system. - Overdue payments: installments not received by the stated due dates are delinquent; a late fee of 3% is added to past‑due accounts. After one month of non‑payment parents will be asked to make payment in full or withdraw the child; accounts not settled within two months may be referred to a legal collection agency. What tuition includes and excludes / Other chargeable items - Included in tuition: cooked lunch, morning and afternoon snacks, usage of textbooks, yearbook, one physical education uniform, clubs/sports/music/art offered by MEF IS teachers during school and after school, coverage of Cambridge Checkpoint and up to eight IGCSE exam fees per year (certain exam‑related extra charges excluded), and one session of IB DP final exam fees (excludes re‑marks/re‑takes). - Not included in tuition and charged separately by families as needed: school bus transport (optional, fee‑based), clubs or activities run by outside organisations, IELTS/TOEFL/SAT/ACT fees, computers/laptops/iPads/calculators, personal stationery, extended overnight or out‑of‑city trips, exam late‑entry fees, rechecks and postal charges. Families are responsible for devices required (Grades 4–8 iPad requirement; Grades 9–12 recommended laptop specifications). - Uniforms: one physical education uniform is included in tuition; additional uniform items are an extra cost. Refunds and withdrawals - Withdrawal refund rule: a 10% deduction will be made from the full year school fees (placement fee + yearly tuition) when a child's enrolment is withdrawn during the academic year. If the school year has not begun, the remaining amount after the 10% deduction is reimbursed in full. If withdrawal occurs during the school year, the refund is prorated based on the number of days until withdrawal; refunds are returned to the original payer. Late fees (if any) are not refunded. - New registrations during the school year: tuition will be calculated pro rata for the number of days attended in the registration month plus the remaining part of the academic year. Boarding - Boarding is not applicable. MEF International School, Istanbul operates as a day school; students are expected to remain on campus for the school day and the school offers an optional, fee‑based bus service for transportation. Fee payment options (accepted methods and practical notes) - Primary accepted payment method: international bank transfer (wire) in US dollars to the school's USD account (SWIFT/IBAN details are provided in the school's payment instructions). Transfers should cover all bank charges so the school receives the full USD amount. Email a copy of the bank receipt to the Admissions/registration email provided by the school once payment is made. - The school's payment policy notes that different bank accounts are specified for general tuition and IB DP tuition; follow the payment instructions for the correct beneficiary account. Discounts - Sibling discount: 10% for two siblings, 15% for three or more siblings applied to total tuition (not to application, registration or placement fees). Corporate group discount: 5% for five or more enrollments from the same company/consulate meeting eligibility requirements. The total discount cannot exceed 25%; multiple discounts are applied in a stepped order starting with the largest. (End of fees summary.)
Diving deeper	Diving deeper
Boarding arrangements	Boarding arrangements —	Boarding arrangements —
Uniform requirement	Uniform requirement —	Uniform requirement —
Food options	Food options —	Food options —
House system	House system —	House system —
Governance and ownership	Governance and ownership —	Governance and ownership —
Academics	Academics
Curriculum details	Curriculum details PEI Canadian Diploma program at Keystone International Schools follows the Prince Edward Island system. It offers a Canadian high school diploma, with instruction in English and learning in French as an additional language. Grade 1 to 12 students are registered with the PEI Ministry of Education and have access to a PEI online library. The curriculum emphasizes critical thinking, communication, and real-world application, combining academic and applied courses, project-based learning, and standardized assessments such as the MAP Growth tests and DELF for French. English is the primary language of instruction, accompanied by an Intensive English Program for students needing extra support, and French is taught through a CEFR-aligned streaming program with additional intensive options. The program integrates language, music, arts, science, and physical education, with opportunities for exhibitions and field experiences.	Curriculum details Cambridge IGCSE is offered in Grades 9–10; in Grades 11–12 MEF IS offers either the International Baccalaureate Diploma Programme (IBDP) or the IB Certificate Programme (Course Certificate route). The IB Diploma Programme uses six subjects across Groups 1–6 with Core Components: CAS (Creativity, Activity, Service); Extended Essay (EE); and Theory of Knowledge (TOK).
Student teacher ratio	Student teacher ratio —	Student teacher ratio Staff to student ratio is 5:2.
Exam results	Exam results MAP Growth assessments are used to monitor progress in Science, Mathematics, and Language. DELF is used to assess French language proficiency. The PEI system supports the pathway to earning a Canadian high school diploma.	Exam results 2024: MEFIS Highest Score 44; MEFIS Average 32; Global Average 30.32. 2023: Highest 40; Average 32; Global Average 30.24. 2022: Highest 44; Average 34; Global Average 31.98. 2021: Highest 43; Average 37; Global Average 32.98. 2020: Highest 42; Average 33; Global Average 31.34.
Higher education progression	Higher education progression Graduates have acceptances to universities around the world, including the University of Toronto, University of Amsterdam, Koç University, IE University, and King's College London, among others.	Higher education progression Almost 100% of graduates have attended world-class universities. 2022 university acceptances include UK: Imperial College London; Newcastle University; The University of Nottingham; University of Bristol; University of Cambridge; University of Kent; University of Manchester; University of Reading; University of Sheffield; University of Southampton; University of Surrey; University of Warwick. USA: Boston College; Boston University; Drexel University; Fordham University; Georgia Institute of Technology; Hofstra University; Indiana University Bloomington; Michigan State University; North Carolina State University; Pennsylvania State University—University Park; Pepperdine University; Texas A&M University; Texas Christian University; UC campuses (Davis, Santa Cruz, Merced, Riverside, San Diego, Santa Barbara); University of Indianapolis; University of Massachusetts Dartmouth; University of Massachusetts Amherst; University of Massachusetts Boston; University of Miami; University of Minnesota; University of Wisconsin. Canada: McGill University; McMaster University; Toronto Metropolitan University; University of British Columbia; University of Toronto. Europe: Trinity College Dublin; Erasmus University College; Jacobs University; Nuova Accademia di Belle Arti Milano; Stenden University of Applied Sciences; TIO University of Applied Sciences; Universidad Carlos III de Madrid; University College Maastricht; University of Amsterdam; University of Twente; Vrije Universiteit Amsterdam; Wageningen University and Research Centre; Yeditepe University.
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 —	Social & emotional learning —
Special educational needs (SEN)	Special educational needs (SEN) —	Special educational needs (SEN) —
English as an additional language	English as an additional language —	English as an additional language —
Mental wellbeing	Mental wellbeing —	Mental wellbeing —
Safeguarding	Safeguarding —	Safeguarding —
Safeguarding policy	Safeguarding policy —	Safeguarding policy —
Facilities	Facilities
Facilities overview	Facilities overview —	Facilities overview —
Sports facilities	Sports facilities —	Sports facilities —
Academic facilities	Academic facilities —	Academic facilities —
Extra curricular facilities	Extra curricular facilities —	Extra curricular facilities —
Parent experience	Parent experience
History	History —	History —
Community	Community —	Community —
Parent teacher association	Parent teacher association —	Parent teacher association —
Extra-curricular	Extra-curricular
Academic & intellectual	Academic & intellectual —	Academic & intellectual —
Arts & creative	Arts & creative —	Arts & creative —
Cultural & language	Cultural & language —	Cultural & language —
Social & hobbies	Social & hobbies —	Social & hobbies —
Community & service	Community & service —	Community & service —
Leadership & professional	Leadership & professional —	Leadership & professional —
Lifestyle & wellbeing	Lifestyle & wellbeing —	Lifestyle & wellbeing —
Language provision	Language provision
Language provision	Language provision —	Language provision —
Bilingual teaching	Bilingual teaching —	Bilingual teaching —
Immersion programs	Immersion programs —	Immersion programs —
Reputation	Reputation
Awards	Awards —	Awards —
Accreditations	Accreditations —	Accreditations —
Admissions	Admissions
Admissions	Admissions 1. Learn About Our School. Visit us in person during regular school hours to experience our classrooms and student life firsthand. If you are abroad, a Zoom meeting can be arranged to answer your questions. Before your visit, think about what matters most to you in a school environment and prepare questions about our programs. A school tour can be requested using the form below. 2. Apply. Complete our Registration Form if you decide to proceed. Applications may be submitted in person or online. If you wish to expedite, you may skip the tour and directly register online. Our admissions team will review your application and confirm the next steps. 3. Exams and Interviews. After we receive your application, we will schedule exams and interviews based on your child's grade level. These assessments help us evaluate your child's academic readiness and fit with our school culture. The results guide the admissions decision and inform the next steps in the process. 4. Admissions Decision. You will be informed of the admission decision within 5 days of completing the assessment process. The decision is communicated to families, and next steps for enrollment will be provided. This timeline helps families plan for the next steps in the admissions process.	Admissions 1. Submit the MEF IS Application Form for new students and pay the application fee. Applications are considered only after the fee is paid, and decisions are made on a case-by-case basis. For the 2026-2027 school year, grade placement requires successful completion of the previous grade level, and the academic year runs from September to June. A proficient level of English is required for enrolment in Grades 9-12 (at least A2), with an intermediate level (B1-B2) for Grades 10-12; the school may administer a WIDA English assessment at its discretion.
Scholarships	Scholarships —	Scholarships Scholarships may be offered; if a student is found eligible for a scholarship, whether full or partial, the tuition fee will be refunded to the parent/guardian within two months after the start of the academic year.
Waitlist	Waitlist —	Waitlist There is currently no waiting list for entry into MEF IS Istanbul. From time to time, classes can reach maximum capacity, so applying early is advisable.
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