The Branches of Government explained:

http://www.usconstitution.net/constquick.html http://courts.michigan.gov/lc-gallery/class_material/3_branches/3-branches.pdf
http://courts.michigan.gov/lc-gallery/class_material/3_branches/fed_state_local_levels.pdf
http://courts.michigan.gov/lc-gallery/class_material/3_branches/Which_branch_is_it.pdf

These are good links that break things down into simple bites!