Here are some useful animations/tutorials on the macromolecules:
http://bcs.whfreeman.com/thelifewire/content/chp03/0302002.html (animation)
http://www.biology.arizona.edu/biochemistry/problem_sets/large_molecules/02Q.html (this is a quiz with a tutorial)
YouTube videos on all the macromolecules
Carbs
Carbs 2
Lipids
Proteins
Nucleotides