The Temple of Art http://www.arts.rpi.edu/%7Eruiz/IMAGING/temple.html

Composition

http://www.arts.rpi.edu/~ruiz/Lessons/lesson6composition/composition.htm

Form

http://www.arts.rpi.edu/~ruiz/Lessons/lesson7form/Form.htm

Perspective

http://www.arts.rpi.edu/~ruiz/Lessons/lesson2perspective/perspective.html

Light

http://www.arts.rpi.edu/~ruiz/Lessons/Lesson3light/Light.html

Color

http://www.arts.rpi.edu/~ruiz/Lessons/lesson8color/Color.html

Proportion

http://www.arts.rpi.edu/~ruiz/Lessons/lesson5proportion/Proportion.htm

Motion

Lesson: Movement

http://www.arts.rpi.edu/~ruiz/lessons/lesson4motion/Motion.htm
the myths of persistence of vision

http://www.privatelessons.net/2d/sample/m01_03.html

http://www.wikipedia.org/wiki/Animation