Your device is currently offline. You can view downloaded files in My Downloads.

Lesson Plan

2. Deciding when to compose a new ten (FP)

teaches Common Core State Standards CCSS.Math.Content.1.NBT.C.4
teaches Common Core State Standards CCSS.Math.Practice.MP6
Quick assign

You have saved this lesson!

Here's where you can access your saved items.

Content placeholder

Card of

or to view additional materials

You'll gain access to interventions, extensions, task implementation guides, and more for this lesson.

Lesson objective: Identify equations that require composing a new ten. 

This lesson helps to build fluency with deciding when a new ten needs to be composed. Base ten blocks are used here because it supports students in seeing how ten individual cubes are equivalent to a ten rod. This work develops students' understanding that we can add tens with tens and ones with ones and sometimes it is necessary to compose a new ten.  

Students engage in Mathematical Practice 6 (Attend to precision) as they trade ten ones for a group of ten.  Trading too few or too many ones will result in a wrong answer.  

Key vocabulary:

  • compose
  • ones
  • tens

Special materials needed:

  • base ten blocks
  • equation sorting cards
  • yes/no sorting headline cards (see In-Class Practice)
Related content

Appears in

Using understanding of place value to add and subtract

Provide feedback