Sites that I can't do without as a math teacher (and what's so special about each one!) Links to virtual manipulatives, discovery-based lessons, free graphing software, question prompts, eBooks, and more.... Tons of resources for math teachers
5 Websites That Will Revolutionize Your Math Teaching
Domino Doubles...Snack Style - Start by adding one chocolate chip on each side to model 1+1= 2. Then add another chocolate chip to each side to model 2+2=4. Continue until you model 9+9=18. Of course, after modeling the doubles, the students eat them!
An Elementary Education Blog: Doubles Dominoes - Snack Style