Anonymous wrote:can you please share the name of the class they went to, was it good?
You'll probably get some good recommendations on this, but note that this is a common discussion in the College/University board here on DCUM. I'd search that board and you'll instantly get long discussions/recommendations.
Personally, my kids start with Khan Academy and a cheap session at MC that just has them take a lot of tests and goes over results. It's not fancy and not expensive. But I think the most valuable thing to do is take a bunch of practice tests, so this fits the bill.