Teaching elementary mathematics - don't skip stages
摘要：
I received recently a book called "Arithmetic for Parents. A book for Grownups about Children's Mathematics" by Ron Aharoni.I want to tell you a little bit about this book, because I think it is excep... 阅读全文
posted @ 2009-01-28 16:46 cy163 阅读(402) 评论(0) 推荐(0) 编辑
