This is a great way to teach and reinforce base ten concepts and operations in algebraic thinking. You will provide each student with a blank hundreds board. You will be the only person looking at the Legend. When you are asking students to color a square according to the legend, you will give clues as to what the number is, for example you might say: Color the number blue that is a single digit number that falls between 3 and 5. Or: Color the number red that is ten more than 16. Or: 10 less than 36. Or: Color the number red that has a 4 in the tens place and a 7 in the ones place. Or: Color the number red that is the sum of 10+10+10. The possibilities are nearly limitless. Call out the clues out of order to keep your students curious. What a surprise when the students begin to see a picture on their hundreds boards! So Easy and So Fun! Your students won't even realize they are learning!