Use this lesson to introduce composing and decomposing as part of your students’ addition and subtraction toolkits.

Students put their understanding of one and 10 more to work as they write word problems for classmates to solve. This lesson plan can be used alone or with Picture Addition.

Use a sweet treat to help students do hands-on math! Students will practice their addition skills in this yummy activity.

Support your students' understanding of word problems as they invent strategies to add three addends in any order. Use this scaffolded EL lesson plan alone or with How'd You Get that Many?

Students sketch base-ten blocks in this lesson that builds both number sense and fluency adding to 20!