CoolMath calls itself “an amusement park of math and more.”
Children can play online math games that help them with addition, subtraction, multiplication, division, decimals, money and more.
CoolMath is geared toward ages 13 and up, but sister site CoolMath4Kids.com is appropriate for ages 3 through 12.
CoolMath-Games.com includes math games for preschoolers.
我覺得這個系列都做的還不錯，這是配合學校發展出來的網頁，裡面說明數學的方式很像Math u see，我還滿推薦的。有廣告，但是不多。
12歲以下的是 CoolMath4Kids.com
(我記得這個是完全免費的)
Pre – Algebra / Pre – calculus是 Coolmath.com
(這個我就不知道了，我家還沒到這個階段，所以沒研究。)
Logic & Thinking Coolmath-Games
(School Day的時候是不用錢的，假日跟節日才需要付錢，這家月費也不貴，一個月四塊。)
這家的遊戲還不錯，以不用錢的網頁來講，品管還不賴呢!
withVal 