100 days!

Today we worked on some 100 day math centers- 100s puzzles, build a structure with 100 large or 100 small cups, 100s number line squeeze.
Each partnership had a number line from 1-100. One child was the writer and the other was the guessed. The writer chose a number between a given set, such as 1-20 or 20-30 and wrote it on a secret ballot. The guessed had to ask questions, such as "Is it less than 15?" The writer would answer yes or no, and move a clothespin accordingly to help narrow down the guesser's numbers.