Teaching Tools in Plant Biology is an online educational resource published by The Plant Cell and the American Society of Plant Biologists. Each Teaching Tool includes a set of about ...
Hi Michael,
SAPS (Science and Plants for Scools) suggests algae wrapped in jelly balls and they have lots of online resources for their use (http://www.saps.org.uk/secondary/teaching-resources/235). I haven't tried this method myself but I've heard that it works really well. You might have to contact SAPS directly for advice about how to obtain the algae though...
saps@hermes.cam.ac.uk. Good luck!