Welcome Lexy!
We are using the above mentioned math program, & have also had wonderful success with Little Reader. Check out my blog if yiu want to read more about our experiences the link is in my siggy. I have an important posts page that would be good to read as well as a link to all my BrillKids posts in the right hand sidebar of the blog.
Please feel free to post an introduction thread to tell us all about your little son or ask any questions you may have