NCTM http://standards.nctm.org/document/eexamples/chap4/4.2/index.htm#applet
(Sample link) National Geographic for Kids http://www.nationalgeographic.com/kids/
epals email students around the world. http://www.epals.com/login/
Book Adventure Read books online and answer questions for points. http://www.bookadventure.com/
Contractions fun practice http://www.manatee.k12.fl.us/sites/elementary/samoset/Resources/klcontractions.htm
Contraction games http://www.primarygames.com/contractions/question1.htm
Proper Nouns http://www.studyzone.org/testprep/ela4/g/capitalizationp3.cfm
Cool math games http://coolmath4kids.com
Raz Kids http://www.raz-kids.com/main/Login
Fierless Frieda http://www.earobics.com/gamegoo/games/frieda/frieda.html
Grammar Ninja find parts of speech in a game format. http://www.kwarp.com/portfolio/grammarninja.html
problem solution http://www.studyzone.org/testprep/ela4/a/problemsolutionp.cfm