Tyler was a troublesome student. He sat in the back row. Every time I called him to answer questions, he’d reply with a flip（轻率的）answer. If he got it wrong, he would get very angry.

Usually kids could sit quietly in class. However, Tyler was just loud. One day, Tyler was talking while I was teaching. I said to him, “Tyler, why not join in our discussion instead of having one of your own?” He got up from his chair, pushed it over, and shouted something I can’t remember. I sent him to the office and he received a week’s out-of-school punishment.

The week was a wonderful time for me, but when it came to an end, I began to feel worried. So I came up with a plan. On the day of his return, I told him I wanted to start over with him. If he felt like he was going to lose control in class, he could step outside the door for a moment.

From then on, Tyler was a changed student in my classroom. In fact he was a smart child and he even stopped a fight between two students one day. And he never used the privilege（特权）to leave the class for a moment. I believe that just letting him decide for himself made all the difference.

When the year was over, he wrote me a thank-you note about how good the year had been for him. I still have it today and find it very moving to reread when I get stressed about teaching.

On a small farm in Mexico, there are no schools. A bus is the school. The driver of the bus is the teacher. It’s a school bus, but it doesn’t take the children to school. It just goes round from place to place, and sometimes it comes to this farm. The bus will stay here for three months. The farmers call it a school on wheels(轮子). Every time when the bus comes, the farmers will come, running to it, shouting and laughing. They warmly welcome the school bus.

When the bus is on the farm, in the morning, the teacher teaches the small children. In the afternoon, the bigger children come to have their lessons because they must work in the morning. At night, the fathers and mothers come to school. They want to learn, too. How the farmers hope that someday they can have a real school on their farm!