The purpose of this activity is for students to produce written numbers for a given quantity represented in different ways. Some representations show the tens on the left and others show the ones on the left. Students must attend to the units in each representation and the meaning of the digits in a two-digit number. Students shouldn’t always write the number they see on the left in the tens place and the number they see on the right in the ones place (MP6).

• Invite students to share the 2-digit number that matches each representation and explain how it matches.

The purpose of this activity is for students to learn a new center called Write Numbers. Students choose to count forwards or backwards by starting at either of the two-digit numbers on a gameboard. They take turns counting by 1 and writing the next one, two, or three numbers in the sequence. The player who writes the last number on the gameboard wins.

Consider laminating gameboards or placing them in sheet protectors so they can be used multiple times.

• “¿Qué patrones vieron mientras escribían los números?” // “What patterns did you see as you wrote numbers?” (The ones place goes up by 1 each time until you get to 9. Then the tens place changes by 1, and the 0–9 pattern repeats.)