Use this scaffolded EL support lesson to help students learn the strategy of decomposing three-digit numbers to add their place values. This lesson can be used alone or prior to teaching Composing and Decomposing to students.
Students will be able to add two three-digit numbers using decomposition and place value.
Language
Students will be able to explain how to use decomposition to add two three-digit numbers with academic vocabulary using sentence frames and partnerships for support.
Introduction
(2 minutes)
Gather the students together and explain that today they will be learning different strategies to add numbers.
Ask students to think-pair-share what the word strategy means. Allow a few students to offer ideas. Clarify that a strategy is a plan of action for solving a problem.