It’s always fun to incorporate a little seasonal spirit into center activities. Many of my first grade friends are now learning place value using base 10 blocks and I thought it’d be a great time to introduce a hands-on winter themed activity. The self-checking feature of this activity makes it perfect for independent centers. When you download the file you’ll receive the template and 50 snowballs with numbers 1-50. The student simply chooses a snowball and builds the number. When done, he/she just turns the snowball over and checks to see if the number of rods and units match. The Representing Numbers Using Base 10 Blocks can be found in my online Teachers Pay Teachers store or on the Make,