This site seems to have more than this to offer, but I stumbled on it because of this neat feature. It offers a sequence of photos of models to practice figure drawing.
They have timers so that you must draw something in 30 secs or 1.5 minutes. It’s like a free practice class!
They have some good free lessons.
Drawspace is more than just another art website; we are an international community of over 320,000 drawing enthusiasts, professional artists, art educators, and authors of art books. Check out our huge (and continuously growing) library of free, downloadable, high-quality lessons authored by world-renowned artists, art educators, and authors (no registration or log-in needed).
Visit at http://www.drawspace.com/