http://www.sciencetech.technomuses.ca/english/schoolzone/Info_Simple_Machines2.cfm#simple
http://mathas210.wikispaces.com/file/view/18-simple-machines.jpg/165147115/18-simple-machines.jpg
http://science.phillipmartin.info/science_machines.gif
http://media.web.britannica.com/eb-media/20/93320-004-28BFD092.jpg
http://havsimplemachines11.wikispaces.com/file/view/double-pulley-system.jpg/288579492/double-pulley-system.jpg
http://7468-group4-simplemachines.wikispaces.com/file/view/plane.jpg/315863326/plane.jpg
http://www.clear.rice.edu/elec201/Book/images/screw.gif
http://nhphysics.com/images/simple_machines.gif
http://im.glogster.com/media/4/21/83/79/21837949.jpg
http://www.beaconlearningcenter.com/weblessons/simplemachines/graphics/WandALabeled3.jpg
http://www.fi.edu/time/Journey/Time/Escapements/lever.gif
http://sln.fi.edu/qa97/spotlight3/spotlight3.html
http://simple.wikipedia.org/wiki/Archimedes
http://www.wiziq.com/tutorial/7644-Simple-Machines-In-Ancient-Egypt
http://physics.kenyon.edu/EarlyApparatus/Fluids/Archimedes_Screw/Archimedes_Screw.html
http://en.wikipedia.org/wiki/Stonehenge
http://www.teachersdomain.org/assets/ket/evscps/evscps_int_simpmach/evscps_int_simpmach_l.jpg
http://mathas210.wikispaces.com/file/view/18-simple-machines.jpg/165147115/18-simple-machines.jpg
http://science.phillipmartin.info/science_machines.gif
http://media.web.britannica.com/eb-media/20/93320-004-28BFD092.jpg
http://havsimplemachines11.wikispaces.com/file/view/double-pulley-system.jpg/288579492/double-pulley-system.jpg
http://7468-group4-simplemachines.wikispaces.com/file/view/plane.jpg/315863326/plane.jpg
http://www.clear.rice.edu/elec201/Book/images/screw.gif
http://nhphysics.com/images/simple_machines.gif
http://im.glogster.com/media/4/21/83/79/21837949.jpg
http://www.beaconlearningcenter.com/weblessons/simplemachines/graphics/WandALabeled3.jpg
http://www.fi.edu/time/Journey/Time/Escapements/lever.gif
http://sln.fi.edu/qa97/spotlight3/spotlight3.html
http://simple.wikipedia.org/wiki/Archimedes
http://www.wiziq.com/tutorial/7644-Simple-Machines-In-Ancient-Egypt
http://physics.kenyon.edu/EarlyApparatus/Fluids/Archimedes_Screw/Archimedes_Screw.html
http://en.wikipedia.org/wiki/Stonehenge
http://www.teachersdomain.org/assets/ket/evscps/evscps_int_simpmach/evscps_int_simpmach_l.jpg