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School comparison · Istanbul
Side-by-side comparison · Updated 2026-04-26 · Both schools in Istanbul
| Metric | Istanbul International School | Keystone International Schools |
|---|---|---|
| Curriculum | British | Canadian |
| Qualifications | IGCSE and A-Levels | AP and OSSLT |
| Ages served | Ages 4 to 18 | Ages 3 to 18 |
| Language of instruction |
| English |
| English |
| True annual cost? | $38,997 | — |
|---|
| Hidden fee %? | +4% | — |
|---|
| First-year cost? | $40,497 | — |
|---|
| WhereNext Value Score? | 73/100 | — |
|---|
| Cost percentile (city)? | 64th | — |
|---|
| Students | 375 | 250 |
|---|
| Nationalities | 55 | 42 |
|---|
| Avg class size | 16 | 18 |
|---|
| Admissions | Moderate | Moderate |
|---|
Highlighted cells indicate which school holds the more favourable value for arriving expat families on that dimension (e.g. lower tuition, smaller class size, higher Value Score, more open admissions). Some rows are neutral.
Full profile · Istanbul International School
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Full profile · Keystone International Schools
View the full Keystone International Schools school profile →
Best value in Istanbul
All schools ranked by WhereNext Value Score →
True annual cost in Istanbul
All schools ranked by total annual cost →
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