This is a simple presentation on echinoderms. It covers basic ecology and biology, without too many details on anatomy. It also gives a brief description of some particular species echinoderms. For example, the coral-eating crown-of-thorns seastar and the keystone species, long-spined urchins of the Caribbean.
These notes could be copied by hand in about a 30-45 minutes class period. There are also hyperlinks included for 3 separate short videos (2-4 minutes in length each, YouTube)