• Number of students increase from 40 to 65
  • Grades 9 and 10 as well as preschool are opened
  • Obtaining education license for upper secondary and preschool
  • Applying for status as MYP (Middle Years Programme) candidate school
  • Creating and implementing the quality system of the school
  • Consecutive grades still form mostly combined classes e.g. grade 1 and 2 forms a single class
  • Defining the characteristics of IST e.g. entrepreneurship, mindfulness, multi-intelligence


  • Number of students increase from 65 to 95
  • Grades 11 and 12 are opened
  • Full PYP (Primary Years Programme) status from preschool to grade 6
  • Applying for and obtaining DP (Diploma Programme) candidate status
  • Basic school final exam in accordance with national curriculum
  • Library and science classes are equipped
  • Implementation of specialities of IST e.g. mindfulness


  • Number of students increase from 95 to 120
  • Gradual elimination of combined classes
  • Two classes in preschool
  • Full MYP (Middle Years Programme) member status
  • Gymnasium final examination in accordance with national curriculum
  • Intensification of the specialities of IST e.g. entrepreneurship
  • Continuous implementation of IB in grades 11 and 12 as a DP (Diploma Programme) candidate school.


  • Number of students increase from 120 to 150
  • A further reduction in combined classes with at least 8 individual classes e.g. grade 1 and grade 2 are separate classes with their own class teachers
  • Full DP (Diploma Programme) member status
  • Fully IB accredited education from preschool to gymnasium (grade 12) level
  • Basic school takes final exam in IB system
  • Moving into new school building


  • Number of students increase from 150 to 175
  • At least 11 individual classes across all grades from grade 1 to grade 12
  • IST becomes self-supporting
  • Gymnasium takes final examination in the IB system
  • IST actively participates in international education networks
  • IST becomes a prestigious landmark institution in Ülemiste City


  • Number of students increase from 175 to 200
  • No combined classes
  • 12 classes from grades 1 to 12
  • Both preschool groups are at maximum size of 18 students per group
  • Reputation of IST as preferred school for international education in English is solidified