actually the schools do have "mad minute" training from 2 to 4th

来源: quantnj 于 2012-10-29 20:00:41 [] [旧帖] [给我悄悄话] 阅读数 : 0 (87 bytes)

basically, count how many they can get it right for these operations in 1 minute

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• 比苦闷差多了，比中国的题海根本就是一滴水。 -大号蚂蚁- ♂ 给 大号蚂蚁 发送悄悄话 大号蚂蚁 的博客首页 (0 bytes) () 10/29/2012 postreply 20:01:43

• wow! crazy for 3-4 yrs old. -quantnj- ♀ 给 quantnj 发送悄悄话 (0 bytes) () 10/29/2012 postreply 20:25:48

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