Enchanted Learning
Enchanted Learning: The Triassic Period
Information about the Mesozoic Era, including details and extensive links about the geology and biology of the period. A very thorough site that is geared toward 5 - 8th grades, but useful for all.
Other
Georgia Perimeter College: The Mesozoic Era
This resource provides an overview of the Mesozoic era, with details about each period of geological history.