US Senate
The u.s. Senate: The Senate and the United States Constitution
This site from the United States Senate provides information about the evolution of the Senate as the Constitution was being written by the Constitutional Congress.
PBS
Pbs: The President's Cabinet: Choosing the Right Members (Lesson Plan)
A lesson that involves students in explaining the confirmation process of presidential appointees by testing the system of checks and balances and the separation of powers. The lesson also requires students to simulate the confirmation...