Illuminations: Counting Back and Counting On
Illuminations (National Council of Teachers of Mathematics)

In this lesson, students model subtraction with connecting cubes while the teacher reads to them from counting books.

Illuminations: Counting Back and Counting On
Illuminations (National Council of Teachers of Mathematics)

This lesson, which focuses on the counting model for subtraction, begins with reading a counting book.

Illuminations: Recording Two Ways
Illuminations (National Council of Teachers of Mathematics)

The students make sets of pasta shapes and count some away, then record the subtraction in vertical and horizontal formats.