The OSA Foundation (Optical Society of America foundation) has some excellent, free resources for educators on the topics of light, optics, lasers, and waves.
There are posters, videos, workbooks, demonstrations, and more. You can print your own posters or order a set for free. I received my posters and DVD today and the posters are really nice (and available in different languages) and the DVD's are very interesting and entertaining.
These are great resources for anyone teaching, or learning about, light, optics, lasers and waves.
