I've never heard of Blue Volt before, but I am going to do a search for it right after this. An online course is exactly what I need. Thanks for the tip!

Fiona, I've had nothing but positive experiences ever since I started buying and reading Thomas/ Delmar Electrical books. I don't know everything, but I know a heck of a lot more than I did a year ago, and I've been in the trade for 15 years! Checkout the link and good luck!
http://www.delmarlearning.com/browse_catalog.aspx?cat1ID=ET&cat2ID=NEC