Events

youcubed: Get to Zero
youcubed (Stanford University)

This game provides students practice subtracting from 999.

Illuminations: Fact Family Fun
Illuminations (National Council of Teachers of Mathematics)

In this lesson, the relation of addition to subtraction is explored with fish-shaped crackers.

Illuminations: Block Pounds
Illuminations (National Council of Teachers of Mathematics)

Students explore the use of variables as they solve for the weights of objects using information presented in pictures.

Illuminations: Numbers Many Ways
Illuminations (National Council of Teachers of Mathematics)

Students work with subtraction at the intuitive level as they explore number families and ways to decompose numbers to 10.

Illuminations: Balancing Equations
Illuminations (National Council of Teachers of Mathematics)

This lesson encourages the students to explore another meaning for operations of subtraction, the balance.

Illluminations: Take Away
Illuminations (National Council of Teachers of Mathematics)

The following lesson introduces elementary students to subtraction.

ABCya! Base 10 Fun
ABCya!

Base Ten Fun helps kids understand place value, addition and subtraction through the use of virtual manipulatives.

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: Hopping Backward to Solve Problems
Illuminations (National Council of Teachers of Mathematics)

In this lesson, students determine differences using the number line to compare lengths.

NRICH: Sumo
NRICH (University of Cambridge)

A number game requiring a strategy.

ABCya! Brainie
ABCya!

This educational game for kids will check your math skills.

Illuminations: Comparing Sets
Illuminations (National Council of Teachers of Mathematics)

A children’s book sets the stage for this lesson which encourages students to review counting back. In this lesson, children write subtraction problems and model them with cubes. They compare sets and record differences in the form of a table. The additive identity is reviewed in the context of comparing equal sets.