Hi...welcome. I just found out about the starfall.com website last month and my son loves it. Like the other user suggested, its free and great for preschooler through first grade. Also, have you heard about Kumon? Private tutors can be expensive, but Kumon might be good. The pricing depends on where you live. The website is
www.Kumon.com. The Kumon concept is learning through repetition and the child has worksheets which they complete weekly. There is another website where you can make your own worksheets and print them out
www.worksheetworks.com.
You should also try the free downloadable material from this website, it will really help and its free. Get him into playing music if he is interested. Violin, piano, etc...but be involved and patient.
Something to get him exicited about reading and into books would be Summer reading programs with your local libraries so its perfect timing for you.
Best of luck to you.
