FREE Place Value Boards to add and subtract by 1s, 10s, or 100s
1st Grade Math Game - 1 more, 1 less; 10 more, 10 less.
number bond bracelet
way to teach double digit subtraction...gives borrowing from your neighbor a whole new meaning.
Sidewalk Chalk Math... Subtraction, Addition, and Multiplication outdoor
Number Line Subtraction Game also can use for addition
Montessori-Inspired Ocean Math Activites at PreK + K Sharing | LivingMontessoriNow.com | LivingMontessoriNow.com
Eric Carle math problems and Eric Carle motherload of ideas
Writing math problems to go with bug study. Check out her other ideas for this unit. Really cute ideas and ones students would really like.