softschools- online games and practice pages

mathisfun- definitions, online activities, and practice pages

kidport- online practice pages

IXL- online practice pages (broken down by specific skill)

funbrain- online games

studyladder- create a free account to practice skills

fun4thebrain- self-grading timed quizzes on addtion, subtraction, and multiplication facts

math-play-online games

coolmathforkids-parent tips, online lessons, and online games

sheppardsoftware-free online learning games and activities 

multiplication-online multiplication games

arcademicskillbuilders-online games based on specific skills

gamequarium-online games based on specific skills