This document provides an overview of ancient Greece for a 9th grade social studies class. It defines a city-state as an independent city that acted as its own state, and lists the most powerful Greek city-states as Athens, Sparta, Thebes, and Corinth. It describes the different forms of government - monarchy, democracy, oligarchy, and tyranny. It provides details on Athenian democracy, including its creation by Cleisthenes and key aspects like all free adult males having the right to participate and vote. It also summarizes the conflicts between Greece and Persia, including the invasions by Darius and Xerxes and the Greek victories at Marathon and Salamis.