The Founding Fathers are larger than life in history books, but an engaging video resource brings them up close to your pupils. As viewers meet the founders in the National Constitution Center's Signers' Hall, they learn about the...

What happens at the end of the life cycle of a star? A lesson in the Socratica Astronomy playlist shows three ways a star dies: white dwarf, black hole, and neutron star. Each ending depends on the mass of the original star.