Hurwitz, Johanna.
Helen Keller Courage in the Dark.
Random House. 1997. Chapter book which explores the life of Hellen Keller. This is an easy reader book.
York, Penny.
Experiment Cards (Sound)
Dorling Kindersley. Step by step directions for many sound experiments.
http://www.scholastic.com/magicschoolbus/games/teacher/sound/print.htm
http://www.ptc.dcs.edu/hasp/Sound
http://www.glenbrook.k12.il.us/gbssci/phys/Class/Sound/u1112a.html
http://www.umanitoba.ca/faculties/arts/linguistics/russell/138/sec4/acoust1.htm
http://www.rnib.org.uk/wesupply/fctsheet/keller.htm
http://www.newman.ac.uk/k.james.smith
http://www.state.ct:us/sde/dtl
http://faculty.washington.edu/chudler/bigear.html
http://school-for-champions.com/senses/hearing.htm
www.nichcy.org/pubs/factsheet/htm
www.teachersource.com