There are some new materials being developed now based on what we are learning about how the brain learns. These brain_friendly materials should be an improvement over what has existed. I recently bought a book by Marcia L. Tate titled "Mathematics Worksheets Don't Grow Dendrites." I highly recommend her book. She gives a great deal of information on alternative activities that are better for your child's brain development and for learning.
The Cause _ Printable math worksheets can be used by both parents and teachers to help kids overcome some of their most common problems in leaning math. You see, I'm a professional educator. I teach high school. I'm also a parent. (I wear both hats!) Year after year, I see kids come into my classes completely unprepared to learn math. When I diagnose what the problem is, it's virtually always either they don't know their multiplication tables or, more often, they don't know how to work with fractions.