100th Day of School Activities & Games
Celebrate the 100th day with math games, counting activities, and interactive tools all built around the number 100.
Why the 100th Day Matters
The 100th day of school (usually in January or February) is one of the most celebrated days in early elementary. It's a perfect opportunity to reinforce counting, place value, and number sense — all through the lens of the number 100. Here are activities using our free tools.
Count to 100 in Every Way
Use our Hundred Chart printable as the centerpiece. Have students color-code patterns: shade all even numbers one color, all multiples of 5 another. They'll discover that 100 is divisible by 2, 4, 5, 10, 20, 25, and 50. Then use the Skip Counting Charts to practice counting to 100 by 2s, 5s, and 10s.
100 Math Facts Sprint
Challenge students to complete 100 addition or subtraction facts as fast as they can. Print our Addition Facts and Subtraction Facts worksheets (that's 80 problems combined — add 20 more on the board for a perfect 100!). Or use our Mental Math tool for a digital version.
Build 100 with Base Ten Blocks
Our Base Ten Blocks tool is perfect for this day. Have students build the number 100 in different ways: 1 hundred flat, 10 ten-rods, or 100 unit cubes. Ask: "Which way uses the fewest blocks? Why?" This reinforces place value — the core concept behind understanding 100.
100 Things Collection
The classic "bring 100 things" activity gets even better with math. Have students use our Bar Graph tool to chart what everyone brought. Then use the Place Value tool to decompose 100 into tens and ones — the perfect warm-up for understanding larger numbers.
If you stacked 100 pennies, the tower would be about 6 inches tall. But 100 dollar bills stacked? Only about half an inch! Use our Coin Counter to figure out how much 100 of each coin is worth: 100 pennies = $1.00, 100 nickels = $5.00, 100 dimes = $10.00, 100 quarters = $25.00!
Last reviewed: April 2026