I have been developing a PowerPoint presentation for educational purposes. Presently it has 115 slides and is designed primarily to introduce students to the wonderfully diverse world of CPs by flashing through the photo slides using a minimum of text. I have tried it out in several classrooms ranging from grade 3 (age 9) to grade 11 (age 17) and it generates a good discussion, particularly when followed with a lab exercise using live plants.
The file is about 9.4 MB. If you are interested in trading presentations, let me know. This is for educational purposes only.