XP Math - FREE Math Games - Common Core Math- Lots of games based on TV game shows, i. Wheel of Fortune (geometry) and Plinko/The Price is Right (probability)

Place value anchor chart - Wonderful! I have always used houses and streets to explain place value, now someone has made an anchor chart that I can "borrow".

Math- Kindergarten through Second Grade: Nice partner for the Linus the Minus: Here's an anchor chart on "Gus the Plus", a math brother who helps students remember and understand the symbol for addition.