ISZL at a Glance

Founded 1961
Director Barry Dequanne
Status Not-for-profit, Independent, Day School
Gender Co-educational
Age Range 3 to 18 years old
Language of Instruction English
Student Body
As of October 2022
Total Enrolment: 1,225
Primary: 441
Middle: 336
High: 448

Countries Represented: 65
Average Length of Stay: 5 Years
Faculty and Staff


As of October 2022



Teaching Staff: 216
Average Length of Employment 5.8 years

Non-Teaching Staff: 87
Average Length of Employment 4 years

Countries Represented: 33
Academics International Baccalaureate (IB) World School
Primary Years Programme (PYP)
Middle Years Programme (MYP)
Diploma Programme (DP)
Advanced Placement (AP)
English as an Additional Language (EAL) Programme
First Language (Mother Tongue) Programme
Learning Support
Accreditations Council of International Schools (CIS)
New England Association of Schools and Colleges (NEASC)
Authorisations International Baccalaureate (IB) World School
College Board
Memberships Educational Collaborative for International Schools (ECIS)
Council of International Schools (CIS)
Swiss Group of International Schools (SGIS)
Association for Advancement for International Education (AAIE)
Sports Council of International Schools (SCIS)
European Sports Conference (ECS)
Association for Music in International Schools (AMIS)
Exam Board of the Royal Schools of Music (ABRSM)
International Schools Theatre Association (ISTA)

Student Life Programme


Individualised Personal Development Programme
Outdoor Education Centre in Swiss Alps
Competitive and Non-Competitive Athletics
Arts Programme - Visual, Music and Performing
Extracurricular Clubs and Activities
Holiday Camps
Student-Led Service Projects


Student Support Services


Learning Support
English as an Additional Language (EAL) Programme
First Language (Mother Tongue) Programme offering 15 Languages of Instruction
Student Counselling
College Counselling
School Nurse Offices on both campuses
Bus Service
Lunch Programme


Religious Affiliations