Frog Disection
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This is an awesome video of a frog disection for middel schoolers. If you were squeamish about disecting your frog, this video will cover everything you need to have learned.
http://www.mhhe.com/biosci/genbio/virtual_labs/BL_16/BL_16.html
here's a step by wtep written instruction with pictures.
http://frog.edschool.virginia.edu/Frog2/