Hi,
My son is in 4th and has had a very difficult time with his tables. I have tried cd's and practice sheets. But, nothing helped until I tried Timez Attack. It plays like a video game. He has gone from only knowing his 2's to now knowing all the way through his 6's in less then two weeks. I love this program and it's free.
http://www.bigbrainz.com/Downloadi.html
:D