Crash Course: World HistoryCrash Course is a YouTube channel featuring short, fast-paced video lessons about World History.

Videos move very quickly, almost frantically at times, making them more like entertaining overviews of these topics than serious lessons.

There are a couple of innuendos thrown into both videos, so watch them and use your discretion before showing them in your classroom.

John Green investigates: The dawn of human civilization. How people gave up hunting and gathering to become agriculturalists. How that change has influenced the world we live in today.

Indus Valley Civilization, one of the largest of the ancient civilizations. Who, how, when, where and why of the Indus Valley Civilization. Mesopotamia, and the early civilizations that arose around the Fertile Crescent. The birth of territorial kingdoms, empires, Neo-Assyrian torture tactics, sacred marriages, ancient labor practices, the world's first law code.

Condensed history of India, post-Indus Valley Civilization. John explores Hinduism and the origins of Buddhism. He also gets into the reign of Ashoka, the Buddhist emperor who, in spite of Buddhism's structural disapproval of violence, managed to win a bunch of battles.

Watch the full documentary now (playlist - 2 hours, 20 minutes)