History should always be taught in context in the right order, chronologically. It should also always be used as a tool to learn about human nature. Kids should be taught to look for patterns. If people do A then the result is B. That is what is meant by repeating history. It is by learning these patterns that we get meaningful lessons from the past and that is the point of learning history.
Ancient history starts with the first human records, those of Mesopotamia, and goes until the fall of the Roman Empire in about 400AD.
Medieval history begins in about 400 AD and goes until the Age of Exploration in about 1500 AD.
Not just about the colonies, this period of history covers from about 1500 AD until 1800 AD.
Here are explorations from 1800 to the present day.
One of the most important subjects you can study is government. The government you live under affects your daily life profoundly. So pay attention!