Race to 100 place value game: a 20-minute dice activity for K–2

1. Model one turn with the whole class. Roll both dice, add them, and count that many counters onto the ones side. Say: "I rolled 5 and 4. That's 9 ones."
2. Partners take turns. Before passing the dice, each player says their total: "I have 2 tens and 3 ones. That's 23."
3. Teach the trade. When the ones side reaches 10 or more, count out exactly ten, put them in a cup, and move the cup to the tens side. Ask: "Why can we call this cup one ten?"
4. Keep playing. Every few minutes, stop the class and ask a pair to show their mat while everyone else reads the number together.
5. The first player to reach 100 (ten full cups) wins. Ask: "How many tens make 100? How many more did you need on your last turn?"
6. Play a second round in reverse: start at 100 and remove counters, breaking a ten into ten ones when needed. This is the same thinking students need for subtraction with regrouping.

For younger students: use one die, race to 50, and let them check their count on a hundreds chart. For 2nd grade: race to 200 or 500 and add a "hundreds" side, or roll three dice and add them first. For English learners: post the words tens, ones, trade and total with a picture of a cup and a counter, and accept answers in the sentence frame "I have ___ tens and ___ ones." For students with fine-motor needs: use larger counters such as blocks or bottle caps, or let them track on a hundreds chart with a marker while a partner moves pieces.

Quick check: show a mat with 4 cups and 7 loose counters. Students hold up fingers for the tens, then say the whole number.

If you try it, tell us what your class used for counters and whether the reverse round helped with subtraction.