作文题目：Secrets of A students

作文正文：

（第一段）How do A students like these do it? Brains aren’t the only answer. The most gifted students do not necessarily perform best in exams. Knowing how to make the most of one’s abilities counts for much more.

（第二段）Hard work isn’t the whole story either. Some of these high-achieving students actually put in fewer hours than their low-scoring classmates. The students at the top of class get there by mastering a few basic techniques that other can easily learn. Here, according to education experts and students themselves, are secrets of A students.

（第三段）Concentrate. Top students allow no interruption of their study time…

这是作本书上的范例，请教老师：

1. 标题中和正文中A students 中的students应该为单数student？

2. How do A students like these do it? 是什么意思？

3. 第三段开头Concentrate. 即（一个单词+句号）为何为独立的一句话？这个祈使句应该改为动名词Concentrating作段落小标题，则正确？

4. 第二段的第4行，that other can easily learn 应该改为“that others can’t easily learn”才说明班上的尖子生和普通人不同。

5. 文章中还有哪些我没发现的错误，请老师指出？

谢谢老师！