Lesson Plan

Doubling

Teach your students to double two-digit numbers using decomposition as a strategy.
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Learning Objectives

Students will be able to double two-digit numbers.

Introduction

(5 minutes)
Double BubblesDoubling in the Real World
  • Hold up four objects, like pencils, and tell students that you need double the number of pencils you are holding. *Ask students how many pencils you’ll have if you double the number you are holding (eight).
  • Hold up eight pencils and repeat the question.
  • Hold up 16 pencils and repeat the question. (Note: at this point, students may have a more difficult time answering the question; provide the answer if students are stumped).
  • Tell students that today we are going to be doubling numbers, just like I doubled the number of pencils I was holding. Doubling a number is multiplying it by two.