Fourth Grade Math
Lego math! Boys will LOVE this!
HoJos Teaching Adventures: Math Test Prep Products, Ideas, and FREEBIES!
6th Grade Math Games.... it's like the 3rd post down.. The whole blog is awesome though!
An alternative method for adding and subtracting fractions with different denominators. I've never seen this before, but very interesting!
6th Grade Math Common Core
Decimal math game
Fractions Decimals Percents
Hands On (and feet and breath on!) Line Plots! How to make line plots meaningful...
Finding Prime & Composite numbers by using the Sieve of Eratosthenes
Here's a game much like "Connect Four" where players roll dice, build a number, and then determine if it's prime or composite. Then they cover that number with a marker. The first player with 4 in a row wins!
Multiplication - Factors/Multiples/Primes