Earthworm dissections (pictures of parts): http://biog-101-104.bio.cornell.edu/BIOG101_104/tutorials/animals/earthworm.html
Part of the above lab: http://shs.westport.k12.ct.us/mjvl/biology/dissect/earthworm.htm
Earthworm dissection picture: http://bio.rutgers.edu/~gb102/lab_2/annelida/306c2m.html
Earthworm disseciton guide (lab guide): http://www.hometrainingtools.com/articles/worm-dissection-project.html
Earhtworm anatomy (scitch drawingss): http://www.biologycorner.com/worksheets/earthwormdissection.htm
Earthworm dissection guide (very good): http://www.miramar.sdccd.cc.ca.us/programs/biol/earthworm/
Dissection lab example: http://www.middleschoolscience.com/earthworm2.htm
Dissections online - collection of worm dissecitons: http://bioweb.uwlax.edu/zoolab/Table_of_Contents/Lab-6b/Earthworm_Model_1/earthworm_model_1.htm
Earthworm Coloring Sheet: http://www.enchantedlearning.com/subjects/invertebrates/earthworm/Earthwormcoloring.shtml
Yucky Worm World: http://yucky.discovery.com/flash/worm/
Worm World: http://yucky.discovery.com/noflash/worm/index.html