Virtual Manipulatives from Didax
Virtual Manipulative Library from Toy Theater
Virtual Manipulatives from Mathsbot
Math Learning Center
What your 4th grader should have learned
10 Tips to boost 4th grade math skills
How to help your child be good at math (even if you're not)
3 things to say when your child says "I'm bad at math"
4th Grade practice test
Released NC Test Items for Practice- Choose the grade and test that you want and have your child get extra practice preparing for the EOG.