Earthworm dissection
http://biog-101-104.bio.cornell.edu/BioG101_104/tutorials/animals/earthworm.html
Virtual worm tour
http://www.naturewatch.ca/english/wormwatch/virtual_worm/index.html
Clam dissection
http://biog-101-104.bio.cornell.edu/BioG101_104/tutorials/animals/clam.html
Crayfish dissection
http://biology.about.com/gi/dynamic/offsite.htm?zi=1/XJ&sdn=biology&zu=http%3A%2F%2FBioG-101-104.bio.cornell.edu%2FBioG101_104%2Ftutorials%2Fanimals%2Fcrayfish.html
Starfish dissection
http://www.cumberland.k12.il.us/Schools/CHS/Starwalt%20Projects/Starfish/starfish_dissection.htm
http://www.umanitoba.ca/faculties/science/zoology/faculty/hann/z260/images/seastar.jpg
http://frog.edschool.virginia.edu//Frog2/home.html
3. Comment after each dissection as well.