About This Lesson
This is a very long slideshow of the many aspects of the subjects with lots of photos. Way to long for class presentation but very useful for any teacher who has little background in the area. Also could be useful as a resource for students doing a science research. Almost 200 slides. All of the individual areas are covered in presentation length slide shows in 'share my lesson". Because it is do long I had to brake it into two parts,Part 1 and Part 2.
