Simple Machines http://www.simplemachines.info/
Simple Machine Activities http://www.edheads.org/activities/simple-machines/
Newton's Laws of Motion http://teachertech.rice.edu/Participants/louviere/Newton/
More Newton's Laws of Motion http://www.can-do.com/uci/ssi2001/newtonsphysicsnb.html
Writing Prompts using 6-Traits of Writing http://www.writingfix.com/dailypromptgenerator.htm
Science Fair Project Ideas http://www.terimore.com/
Science Fair Project http://faculty.washington.edu/chudler/fair.html
Multiplication practice www.multiplication.com/interactive_games.htm