Here are some sites that your child(ren) can use that will be helpful when they need extra help in Math.
http://math-play.com/changing-fractions-to-percents.html (to percents)
http://www.aaastudy.com/equ725x2.htm — you can change the type of game to timed, 20 questions, or countdown
http://www.aaastudy.com/equ725x3.htm — you can change the type of game to timed, 20 questions, or countdown (+,-)
http://www.aaastudy.com/equ725x4.htm — you can change the type of game to timed, 20 questions, or countdown(x,/)