2013年10月17日
每日英语：Why Are Fractions Key To Future Math Success?
摘要： Many students cruise along just fine in math until fourth grade or so. Then, they hit a wall -- fractions.cruise：巡航，巡游，漫游 fraction：分数，片段The wall is about to get taller. With mastery of the topic seen as a crucial stepping stone to progressing in math, federal standards are stepping up emphasis on f. 阅读全文
posted @ 2013-10-17 17:42 微雪 阅读(359) 评论(0) 推荐(0)