Don't forget that your efforts with your child's learning are as valuable as the efforts of their teachers. You can have a huge effect on your child's learning at home, by encouraging them to try hard and do well in their studies. There are a number of things you can do at home to enhance your child's mathematical skills if they appear to be struggling with their math studies at school.
Combine math with reading _ There are quite a few nice children's books out there about math and who does not like a deal. Imagine it's a 2 for 1 deal you are getting, with the opportunity for your kid to enjoy reading and math at the same time. The Sir Cumference series comes to mind with its attractive illustrations and adventures. Less than Zero is another. It gives a good introduction to the concept of negative numbers. Also One Hundred Hungry Ants appeals to kids too. Well who doesn't love bugs? Check out online stores where you can read reviews but remember to ensure that the reading level is not more advanced that necessary to get the math concepts across. If that is the case that will just take the fun out of it and make your children frustrated.