It too sounds a fine idea, but even top private schools, with lots of money and good teachers, find it tricky to timetable lots of variation within one age-group's lessons.

这听起来也是个好主意，可是即使是最顶尖的私立学校，有大笔的资金和优秀的老师，也认为在某个年龄段的课程中以一个课程表考虑到大量变化因素实在是勉为其难。

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How to deal with such problem is a hard job for teachers, a good teacher can always find a effective way to reduce it.

如何处理这样的问题是对一个老师来说是份艰难的活，一个好老师总是可以找到一个有效的方法来减少此类问题。

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A strict, dedicated teacher produces outstanding students, according to preliminary results from a $45m US research project intended to find new ways of distinguishing good teachers from bad.

一项美国研究初步结论显示，严厉而认真的老师教出的学生的确更优秀。 这项耗资4500万美元的研究旨在发掘优秀教师具备的特征。

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Ichiro Murata, a director at the Academy of Management Development, which lists many of Japan's corporate giants among its clients, says it is hard to find good teachers who understand both technology and business.

ECONOMIST: Japan's best engineers are having to learn about business

"We find that once the very good teachers have that experience, many of them want to stay, because they find they can contribute so much more, " Mr Holley said.

BBC: Teacher

Let's remove barriers to qualified instructors, attract and reward good teachers, and help bad teachers find another line of work.

CNN: McCain: Change is coming