PBS
Pbs Learning Media: The Transforming Leap, From Four Legs to Two
John Noble Wilford, a "New York Times" science writer, outlines various hypotheses on the origin of bipedalism.
NASA
Math Lesson Plan: Cyanobacteria Races: Cyanobacteria Motility [Pdf]
A comprehensive lesson plan about the movement of cyanobacteria includes a class experiment.