Overview
Think Math! is founded upon the principle that children are curious problem solvers. Each grade level’s content builds a puzzler’s disposition, developing mathematical “habits of mind” through games, puzzles, mental math, and other collaborative activities – with the goal of providing engaging and motivating experiences for a community of diverse learners.
In Think Math!, third graders use visual models, including arrays and intersections, to build a foundational understanding of multiplication. Starting with smaller models (e.g. 3 × 5 array 
or 12 intersections 
) and eventually moving to larger models (e.g., 12 × 11 array), children use partitioning as strategy for decomposing into smaller parts. They investigate division as “undoing” multiplication – and relate multiplication to area (while also experimenting with perimeter). Fractional understanding, including naming fractions, making equivalent fractions, and comparing fractions by size and location on the number line, is also explored (and further developed in grades 4 and 5).
All student materials can be accessed through the table below as PDFs by chapter.