By the way Google is currently not working on my computer, so if your going to give me search sites please use Bing
This topic is so broad I do not know where to start:
Athenian democracy - pure democracy, nice but practical only in a small city state. Even there it led to tyranny of the majority and for example they voted to murder Socrates.
Roman Republic - Next step toward our representative republican form of government but senate was nobles, More like oligarchy. It degenerated into empire after Julius Caesar with only the trappings of a republic.
England - Magna Carta establishing basic rights, but again for nobles.
John Locke - principles of democracy
American revolution - federal republic (not a democracy as in Athens by the way but a Union of States with representatives in Washington. That is why we have an electoral college and not popular vote nation wide for president - important principle often forgotten.
Shay's - assume you are just studying this objection to the new US system.
By the way the issues in Shay's rebellion are strikingly similar to the Occupy Wall Street protests happening right now, as I am sure your teacher has pointed out.
Tank you very much for your help.:) actually my teacher hasn't pointed anything out since I don't have one. My younger brother and I are home-schooled.
You don't have a teacher? I thought parents were teachers for home-schooled students.