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

Lesson Plan

2. Count once and only once (C)

teaches Common Core State Standards CCSS.Math.Practice.MP2
teaches Common Core State Standards CCSS.Math.Content.K.CC.B.4a
Quick assign

You have saved this lesson!

Here's where you can access your saved items.


Card of

or to view additional materials

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

Lesson objective: Understand that when counting a collection, each item must be counted once and only once.

Students bring prior knowledge of rote counting within 20 from K.CC.A.1. This prior knowledge is extended to counting with one-to-one correspondence as students practice counting a collection of items. A conceptual challenge students may encounter is understanding that each item must be counted once and only once. 

The concept is developed through work with blocks, which help students connect numbers to the objects being counted.

This work helps students deepen their understanding of number because counting objects is a foundational skill that strong number sense will build upon.

Students engage in Mathematical Practice 6 (Attend to precision.) as they count a collection of objects carefully, making sure to count each object once and only once.

Key vocabulary:

  • collection
  • counting
  • eight
  • five
  • four
  • nine
  • object
  • one
  • seven
  • six
  • ten
  • three
  • two

Special materials needed:

  • 1 bag (per partnership)
  • 1 red block (per partnership)
  • 2 blue blocks (per partnership)
  • 3 purple blocks (per partnership)
  • 4 yellow blocks (per partnership)
  • 5 green blocks (per partnership)
  • five frame and block matching cards (provided)
Related content

Appears in

Rote counting and understanding the amount created

  • 1. Rote counting to 10 (C)

  • 2. Count once and only once (C)

  • 3. The last number said tells the number counted (C)

  • 4. Counting to 5 (FP)

  • 5. Counting to 5 (A)

  • 6. Counting to 10 (FP)

  • 7. Counting to 10 (FP)

  • 8. Counting to 10 (FP)

  • 9. Counting to 10 (A)

  • 10. Rote counting to 20 (FP)

Provide feedback