Reading through the Ohm's law material in Vol. 1, the math is quite managable, but I'm afraid it isn't really sticking in my head the way it ought. It seems like a couple assignments at the end of each chapter (or subchapter) would be very helpful in committing the formulas to memory.

Is there anywhere on the web with problems at the right gradiations of difficulty level to help me along with this site?

Jeez, I'm asking for problem sets! Never thought I'd see the day...

 

Tony has a new project called 'Socratic Electronics' @ http://www.ibiblio.org/obp/books/socratic/

I think that is exactly what you are looking for

For example, http://www.ibiblio.org/obp/books/socratic/output/ohm_law.pdf

The excercises will be integrated into AAC soon enough! I've been working with a friend to html-ize the worksheets. It's a long process, but I think it will be worth it.