Thanks,your Method is right for tutoring your son.I think,

来源: 于 2011-01-09 09:57:44 [旧帖] [给我悄悄话] 本文已被阅读：次

If you have time you also can teach your son playing chess or weqi,it is very good for thought by heart...,Math is very useful,I know a lot Math students went to other major and being top students....