(Add your lessons, units, webquests, resources, links, wisdom, etc. here)

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How Stuff Works - "How does a catapult work?"
http://science.howstuffworks.com/question127.htm

Wikipedia: Catapult
http://en.wikipedia.org/wiki/Catapult

Make Your Own Catapult
http://www.open2.net/diyscience/mangonel/index.html

Catapults - Simple One to Build
http://www.knightforhire.com/catapult.htm

Building a Catapult
http://members.shaw.ca/applytech/at/catstep.htm

Making Marshmallow Catapults
http://www.life.uiuc.edu/boast1/sciencelessons/levers.htm

Catapult Project at SmithTown Central
http://www.smithtown.k12.ny.us/msteched/catapultproject.htm

Middle School Catapults
http://www.smithtown.k12.ny.us/msteched/catapultproject.htm

Catapult Applet
http://www.lcse.umn.edu/specs/labs/catapult/practice.html

Catapult Design Pictures
http://whs.wsd.wednet.edu/Sci/Lorenson/Catapult/catapult.html