The ISI Lower School begins with pre-elementary classes for students 3 years old through kindergarten before transitioning to the elementary school years from grades 1 to 5. 
Pre-Elementary School 
All pre-elementary classes are part of our language immersion program, with teachers who are native speakers of the students’ target language leading classes. 
 
Pre-elementary classes use the curriculum set by the IB Primary Years Program.
 

Elementary School 
Elementary classes for grades 1 to 5 also follow the IB Primary Years Program curriculum and begin taking an even more significant role in directing their own hands-on learning and finding answers to their questions.

 
The language immersion process is still a significant factor in elementary students' lives. In grades 1 through 3, students begin to receive an hour a day of formal instruction in English. Music is also taught in English. By grades 4 and 5, about half of students’ school week is spent in English, the other half in their target language. ISI is the state's only school offering full language immersion in three languages for Pre-K - Grade 5 students. 
 

Lower School Support Services

All Lower School students are supported by learning support specialists, language support teachers, teaching assistants, and specialist teachers in art, technology, physical education, and music.
 
Students have computer labs and libraries with age-appropriate collections in English, French, Mandarin, and Spanish.
 

school day and classrooms

The Lower School starts classes each morning at 8:15 a.m. and the school day ends each day at 3:00 p.m. Students have morning and lunch recesses.

Pre-Elementary Ratio
With nine teachers and nine assistant teachers, the overall student-faculty ratio in pre-elementary classes is 8:1. Pre-elementary classes can vary in size from very small to 16 students.

Pre-elementary classes near the larger end of this enrollment spectrum utilize full-time teaching assistants. Teaching assistants are either native speakers or are perfectly fluent in the target language for their class.

Elementary Ratio

The student-faculty ratio for the elementary grades is also 8:1. Classes can vary in size from very small to 18 students. The average class size is 12-15 students.

Extracurricular Activities

To reflect our multicultural spirit, ISI incorporates celebrations from many cultures into our school year. Examples include our bell-ringing ceremony at the start of the new school year (Ukrainian in origin), a formal breakfast in early December (from the Dutch tradition of Kerstontbijt), the French Fête des Rois (a traditional Epiphany celebration in January with a marzipan ‘galette’ or cake), the Mexican Cinco de Mayo (5th of May), and others.

Field trips to local points of interest support our pre-elementary curriculum.

Elementary students attend overnight camps and go on field trips that support the elementary curriculum.