题目内容：
I began teaching at the James School twenty-two years ago when I was twenty -six. In those days the place was very different. But time changes, and of course education theory changes, too. Methods and materials change. Even the classroom looks different. Twenty years ago, our classroom was a lot less pleasant. Very old-fashioned. We had fewer window, for example. There were five rows of desks, six desks in a row. Since everything was nailed to the floor, a student sat in the same place all day long. Oh, we had to be very strict. Now students move all over the room. They go to different areas for different subjects, and they write at these movable desks. The students are more mobile, and because they’re more mobile, they’re less restless, and because they’re less restless, they are more attentive. At least that’s the theory. And as a matter of fact, we really don’t have many behavior problems here.
We use a modified open classroom system here at the James. I’ll try to explain what that means. Each student makes a work contract with his teacher. Basically, he agrees to a certain amount of work on a certain project. He hands the work in when he gets it done. He works at his own speed and plans his own time. If he is particularly motivated in one subject—math, for instance—he can explore the subject more thoroughly than the others. But he must also complete his contract in arts
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