The purpose of this activity is for students to sort dominoes into groups by total. This sorting task gives students opportunities to closely analyze different compositions and decompositions of numbers to 5 and make connections (MP7). Because the totals are small, students likely will be able to recognize the number of dots on each side of the dominoes without counting (MP7). Students represent each domino with an expression (MP2).

• Invite a student to share their sort.
• “What is the same about all of the dominoes in this group?” (They all show 4.)
• Display the domino card with 1 dot and 3 dots:

  

• “Tell your partner about this domino. What is the total? What parts do you see?” (The total is 4 dots. The parts are 3 dots and 1 dot)
• “What expression did you write for this domino?” ( or )
• “ and  both show the parts on this domino.”

The purpose of this activity is for students to compare groups of images. Students may compare the total numbers of dots on each domino, or they may compare the parts. For instance, a student might observe, “These dominoes both have 1 dot on the bottom. This one has 3 dots on top and that one has 2 dots on top, so this one has more dots because 3 is more than 2.”

As a variation, the student whose card has more dots takes both cards.

• “What were some of the ways you saw 5 on the dominoes?” (0 and 5, 5 and 0, 4 and 1, 1 and 4, 2 and 3, 3 and 2)
• Share and record each response with an equation.

The purpose of this activity is for students to choose from activities that offer practice with number and shape concepts. Students choose from five centers introduced in previous units. Students can choose to work at any previously introduced stage of these centers:

• 5-Frames
• Roll and Add
• Bingo
• Geoblocks
• Find the Value of Expressions

Students will continue to choose from these centers in upcoming lessons. Keep the materials from each center organized to use each day.

• “What can you do when you’re not sure about a math problem or a center?”