EPGY is a possibility, there is also a program called CTY through John Hopkins. A program many on here use is called ALEKS. It is certainly much more "budget friendly". You pay a monthly fee for use of their site and your child can continue through all of the courses.

My DS6 is being grade skipped to 4th next year and the school is looking at having him use ALEKS for math since his math levels are beyond elementary.

Good Luck and Welcome!

Shari
Mom to DS 10, DS 11, DS 13
Ability doesn't make us, Choices do!