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Lower School

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Developing a Deep Understanding of Concepts

ISB's Lower School prepares students to see things differently using an intentional, holistic curriculum delivered through bilingual instruction and purposeful project-based learning.

We celebrate and encourage students’ natural curiosity and deep understanding of new concepts, building upon their academic foundation through core academic classes and a complete offering of "specials." By the end of Grade 5, students are bilingual, biliterate, and bicultural – well prepared for success in Middle School.

A student and a teacher at a table looking at a book
Elementary school students sitting around round tables in classroom
Two elementary school students looking at a math workbook
A student looking up from a literary book smiling
A group of students wearing blue pinnies posing in a PE class
A student smiling at her locker in an empty hallway

My favorite part of teaching ISB students is facilitating and witnessing critical and reflective thinking from such an early age. These diverse students are globally minded and compassionate humanitarians who wish to leave their mark on the world.Lara, Lower School Classroom Teacher

Our Unique Approach to Bilingual Instruction: Learning in Two Languages

During students’ first two years in Lower School, we focus on rapidly expanding their knowledge of French and English by building strong literacy skills while learning to interact and work with classmates. Instruction is approximately two-thirds in French and one-third in English. Beginning in Grade 3, and for the remainder of Lower School, we place equal time on both French and English while celebrating multiculturalism in general. In Grades 3 through 5, students deepen their language skills by studying rich content. As with our Middle School program, students are not just learning two languages; they are learning in two languages.

In Grades 2 through 5, students also choose between learning Spanish or Mandarin to begin their journey toward becoming trilingual.

Core Curriculum Overview & Progression

New in 2026-2027: Discovery Lab Program

In the fall of 2026, ISB launched its new Discovery Labs, a co-curricular initiative for all students in Grades 1 through 5. The program was introduced through a series of teacher-led Discovery Lab Markets, bringing exciting ideas to life for some of our youngest learners.

Discovery Labs develop students’ creativity, curiosity, reasoning, and critical thinking skills. Students will use dedicated time in weekly cross-grade-level groups to design and implement a collective project. This approach offers a significant advantage for translanguaging and long-term bilingualism.

Projects include “Passport to Play: Traditional Games Around the World,” “Be a Planet Problem-solver,” and “Catching the Light.” Students will tackle questions such as, "Ever wonder what secret worlds are hiding right under your nose?" or will step inside an inspiring story to explore how we share our planet, tackle climate change, and make sure everyone is treated fairly.

Daily Activities

In addition to their core academic program, students also participate in a daily rotation of specials, including: 

  • Physical Education: Students focus on the development of their motor skills as well as cooperation, teamwork, and sportsmanship, through small games, racket sports, and artistic dance and gymnastics.
  • Art: The appreciation of art and the participation in artistic expression play significant roles in the development of the student spirit. Students explore drawing, coloring, painting, design, structure, composition, and more.
  • Music: Our music program allows students to participate fully in a diverse, global society and understand their own historical and cultural heritage and those of others within their communities and beyond. Students will learn to match pitch and sing fluently in both English and French.
  • Library: Each class will have dedicated time in the Lower School Library each week. Students are able to check out books from the Library, as well as visit during open Library hours twice weekly.
  • Theater: The Foundation of our Lower School theater classes is artistic and cultural expression. Students experiment with different types of movement and emotions, participating in group and individual projects and performances that culminate in our Grade 5 Theater in Residency Program with Central Square Theater. For students in Grades 1 and 2, theater is an avenue for practicing oral expression in both English and French. 

Lower School is also the beginning of our Global Learning Program, beginning with overnight trips in Grade 1. Learn more here.