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
Fifth grade math station at Scarborough Elementary
One week to Math Centers! How to start guided math and math centers- one week introduction! (scheduled via http://www.tailwindapp.com?utm_source=pinterest&utm_medium=twpin&utm_content=post624155&utm_campaign=scheduler_attribution)
This would be a great center activity for math while teacher is doing small group instruction! It takes multiplication from just recalling facts to a deeper level of understanding. LOVE! Multiplication of the Day for 3rd Grade!