Reading and Language Arts Games

Kids Place
http://www.eduplace.com/kids/games.html

Games Goo: Learning that Sticks
http://www.auditory-processing.com/gamegoo/gooey.html

PBS Kids games.  (Mainly working on basic phonics skills.)
http://pbskids.org/lions/games/gawain.html

Family Education (Includes activities, games, printables, and books for fourth grade.)
http://www.familyeducation.com/topic/front/0,1156,66-24182,00.html