ONLINE LEARNING SITES
Kahn Academy. Best place to learn quadratic equations for free. Phenomenal math and science resource. Has an interesting art history section as well. Lots to explore.
Lynda.com Best place to learn any computer program for next to free. Self-paced, amazingly useful instructional videos.
Udacity What happens when a Standford professor quits his job and decides to offer free courses.
Grammar Girl. Blog and podcast on the essentials of grammar.