www.studyisland.com-This site is used widely at school and if used on a consistent basis; will raise your child's state test scores.  You will need your username and password from the teacher.

www.aaamath.com- These are great on level math fact challenges.  Just select your age and the skill you desire to learn! 

www.kidzone.com This Fun Facts site has thematic units, online games for math and language arts, etc.  Timed quizzes for math facts or download free books.

 www.gamequarium.com   These 1500+ links to online games are categorized by core content. Kids can practice skills with scores and times.

 www.funbrain.com -Games for all content areas, by grade, with difficulty levels and scores