PBS
Pbs Learning Media: Migration of the Monarch
This video segment from NOVA: "The Mystery of Animal Pathfinders" explores the migratorial exploits of monarch butterflies. [4:39]
Other
Monarch Watch
This is an excellent resource for information about the monarch butterfly that includes information about life cycle, migration, observation, conservation, classroom activities, butterfly gardening, butterfly rearing, and the like.
Other
The Florida Monarch Butterfly Website
This inclusive site, contains information on how to tell a male from a female Monarch butterfly, great pictures of the Monarch life cycle, and links to other butterfly sites.