Relevant to the tenth amendment is the court case Wickard v. Filburn (1942). The tenth amendment was more or less nullified by the Supreme Court via the Commerce Clause.
Khan Academy: The future of education?
Electoral college | American civics | US History | Khan Academy
The US Constitution
History and prehistory | The Origin of Humans and Human Societies | World History | Khan Academy
Buddhism | World History | Khan Academy
Brexit und die Europäische Union - Grundlagen
Domain and range of a function given a formula | Algebra II | Khan Academy
Globalization theories | Society and Culture | MCAT | Khan Academy
Math Antics - What Are Percentages?
Sal Khan chats with Google CEO Sundar Pichai