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Sophia Learning
Sophia: Economic Basics: Supply and Demand Tutorial
Created to teach students of the 21st century, SOPHIA is bringing the laws of supply and demand straight to your fingertips with this brief lesson.
Sophia Learning
Sophia: Supply and Demand Basics
A series of excellent videos that explain the laws of supply and demand, shortage, surplus, equilibrium, slopes, and shifts. Includes a worksheet (PDF, requires Adobe Reader) and videos.
Khan Academy
Khan Academy: The Supply Curve: Factors Affecting Supply
How the price of inputs, price of related goods, number of suppliers, technology, and expected future prices affect the supply curve.