Math Coach's Corner: Using Number Bracelets to Develop Number Sense. Like dot cards and rekenreks, number bracelets provide concrete practice for number combinations and composing/decomposing numbers. Check out this post for instructions for making and using number bracelets.
My latest greatest math tool find. Draw a number line with sharpie on a ziploc slider bag and use the slider as the tool to add or subtract two numbers. I just filled the bags with addition and subtration cards. I put a piece of white paper in the bag also because it made the numbers a little easier to see. Note: This also shows " than, which helps kids who can't grasp that concept.