We recommend using www.hamtestonline.com for upgrading to General or Extra. It is also a great way to obtain your Technician (first) license. If you need help understanding a specific topic, the following amateurs have volunteered to assist:

Mentors

KB1E KB1E@comcast.net

KT4YA kt4ya@comcast.net

N7WE N7WE@comcast.net (after 11/1/2010)

W2GGC w2ggc@circleoaks.com