We discovered Timez Attack back when we started homeschooling. We used it and liked it, but it moved kind of slow. Thank God for improvements in technology. Timez Attack is up to date and moves like a real video game.
The full version is $39.00, but you can download the base version for free to try it out. Give it a try. I am hearing nothing but rave reviews.
Most Recently Added resources found
at this link