Free mini-lectures

A free mini-lecture based on the principles Richard Duschl wrote about in 1985, which the NSTA and others have heralded. This is an introduction to the nature of science, or NOS, for discussion in a classroom. Uses powerpoint and creative commons licensed photos.
http://www.teacherspayteachers.com/Product/Nature-of-Science-927819

Another freebie; a very short animated introduction to "What is a Scientist?"
http://www.teacherspayteachers.com/Product/What-is-a-Scientist-923281