Math Book Online http://www.eduplace.com/math/mthexp/
Math Book from Home http://www.iusd.org/student_resources/Mathematics.html
Science Book Resources and Activities http://activities.macmillanmh.com/science/ca/
A blog just for 4th grade readers, created by IUSD! 4th Grade Reading Blog
Flashcards - great for studying! Especially Multiplication! http://www.flashcardexchange.com/
White House for Kids http://www.whitehouse.gov/kids/whlife/index.html
National Geographic for Kids http://www.nationalgeographic.com/kids/
Multiplication Help and Games! http://multiplication.com/
Great Spelling Website http://www.spellingcity.com/
Education Search Engine http://www.cuil.com
Great practice problems for different areas in math 4th Grade Math Practice
Multiplication Matching Game http://www.quia.com/mc/916539.html?AP_rand=713964448