The purpose of this activity is for students to revisit Stage 2 of the Find the Pair center introduced in IM Kindergarten. Students practice finding the number that makes 10 when added to a given number. They may use two-color counters and a 10-frame or their fingers to help them determine the number needed to make 10.

Each student draws a hand of 5 cards. Students take turns asking their partner for a card that goes with one of their cards to make 10. When students receive a match, they put down the pair of cards and write an expression on their recording sheet. Students draw a new card when they do not receive a match. Students continue playing until one player runs out of cards or until the center time is over. At that point, the player with the most pairs wins.

• Display a card with a 3.
• “This is my last card. How can I figure out what number to ask my partner for?”
• Invite previously identified students to share.

The purpose of this activity is for students to choose from activities that focus on counting up to 20 objects or adding and subtracting within 10. Students choose from any of the previously introduced stages of the listed centers. They are encouraged to choose the center that will be most helpful for them at this time.

• Counting Collections
• Number Race
• Check It Off
• Five in a Row: Addition and Subtraction
• Find the Pair

In the Activity Synthesis, students discuss ways they can continue building fluency with addition and subtraction within 10 at home. Consider sending home copies of the center activities for students to play at home.

• “We have been playing a lot of games to help us build fluency with addition and subtraction within 10. How can you continue working on addition and subtraction at home?” (I could use flash cards. I could play these games with my family.)