If you want to search on "mikey" and if you find any useful pics ( I do remember posting some algae pics a year or so ago) you have my permission to use any and all - no credit need be given.
If you find any you want and need a hi res version, please pm me and I will send you the originals (before I shrank them down for the net).
I used to give corporate presentations, and if you have a laptop and projector, just use microsoft powerpoint and make some easy slides. If you have no laptop or projector, then make the slides, print them out 1 or 2 slides per page, and have them copied at office max or the like to hand out to the students. Then you can talk and they can follow on their note pages. Also a great place for them to take notes from your fabulous presentation.
Any other "talking points" help or organizational help you need is just a post away - Just let me know.