PBS
Pbs Teachers:monster of the Milky Way: Birth of a Black Hole
Discover how a dying star can be reborn as a black hole. View a slide show that follows the progression of events from an old, dying star to newborn black hole.
CK-12 Foundation
Ck 12: Earth Science: Supergiants and Supernovas
[Free Registration/Login may be required to access all resource tools.] Explain the importance of supernovas and how a star becomes a supergiant.