My daughter just finished the precalc and she enjoyed it! There was no cumulative review outside of the end of semester reviews for the semester exams. She said she took notes and reviewed those notes as she went along. She also worked out of the textbook for extra practice when she needed it. She was able to spend 1 1/2 - 2hrs a week watching the videos in a chapter. Each video on average was anywhere from 2 - 6 minutes long with a few exceptions. What she most liked was her ability to work at her own pace and also that she felt he explained things pretty well. She will do the AP calc and Physics with him next. Hope this helps.

Thanks so much guys!!!!! :-) I really appreciate your help! For the magnets I am thinking that the 3/8 inch with 1/10th' thickness. Does that sound like it could work? Home depot seems to have a pretty good price on the 22 gauge copper as well! Waaay cheaper than what i was looking at at amazon.com!

Hello there, My son really wants to make but I have no idea what to buy. When I look up the copper wire on amazon I see that that copper comes in different gauges? Which gauge would work? where can I find a supply of these magnets at a reasonable price? I am not technical AT ALL - but my little guys seems to leaning in a technical direction so any and all resources would be greatly appreciated. Here is another link to the youtube video in case the link above does not work:

i'm wondering what you ended up deciding since i am planning this for DD

Thanks maize this was exactly what I needed to know

thank you so much for this!!!! and the book you are working on looks amazing - I'll be looking for your announcement on it being finished! self taught eh? I love it! :-)