This tutorial carefully goes through 2 math problems (if you have me currently, we did this one in class)
I STRONGLY suggest that you take the time to watch this and do the problems along with her!
Part I
https://vimeo.com/72275890
This one is the second math review video she does: Part II
https://vimeo.com/72278538
Here is the link to all of the APES in a Box review clips:
https://vimeo.com/tag:apes+in+a+box
GOOD LUCK!!!!