I am a Singaporean who uses one of the Best Math curriculum in the world - Singapore Math (some call it Math In Focus) to coach my children at home. I advocate the importance of making math concept visible and concrete in order to help children learn abstract concept easily. Most of my math worksheets include pictorial models to make math concept visible to the learning child. Kids learn to solve problems with the aid of pictorial models before proceeding to work just on numeric terms.
Adopting the Singapore Math curriculum and this teaching approach had proven to be effective for my kids. In the Cambridge Primary Checkpoint Test for Key Stage 2, my son obtained 5.9/6 for most of the math topics. He got an average of 5.4 for overall in math. My girl obtained 6/6 for her math in Cambridge Checkpoint Test for Key Stage 3 and A* for her IGCSE "O" level. As such, I like to share these resources and urge teachers/parents to help children to lay a strong math foundation.
I like to make learning fun for kids. You can find many learning activities for kids and more information about me at my blog http://www.teachkidlearn.com