The idea of learning through enquiry and experimentation is continued through a students years in secondary school. For a major part of these years ISE's unique curriculum is prescribed and taught. An emphasis on "learning to learn" is laid during this period and students are given more responsibility of their learning outcomes. Opportunities in leadership and co-curricular activities are abundant throughout the students' last years at the school.
The school being affiliated to the CBSE board, students are trained towards excelling in their education while adhering to the norms laid by the NCERT.
Grade 6: 10 years 5 months
Grade 7: 11 years 5 months
Grade 8: 12 years 5 months
Grade 9: 13 years 5 months
Grade 10: 14 years 5 months