Number facts are related, just like families! Help students learn all about fact families while they make fact family trees!

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

Let’s start building numbers! Just as building skyscrapers is a visual representation of mathematics, students will use the visual representation of base-ten blocks to add—or build—onto a two-digit number.

Your young scientists will have tons of fun visiting measurement stations and using tools to measure various objects. They'll even be able to create posters at the end of the activity.

Use this lesson to review three-digit addition strategies including base-ten drawings, number lines, and the standard algorithm.