“The Mystery of the Far-Flung Fossils” is a very good kit for investigating plate tectonics as the grounds for the similarity of fossils on the continents. The kit can be ordered here and from most science catalogues. I recommend that the continents be laminated before use.
The “Becoming Human” website has a documentary along with several classroom activities. Tom Wanamaker of the NSTA Listserve contributed this worksheet (doc), “Becoming Human Questions,” to go with the website.
Have students do this “The History of Life” (doc) crossword puzzle.
Teacher’s Domain’s “Deep Time” lesson (You must register for free to access.) includes a Flash interactive segment, html reading, and “Live-Action Student Timeline” activity.
Watch the “Radiometric Dating” video and answers the questions in this Teacher’ Domain lesson.