读短文，选答案。

           Usually I go to school on foot but this morning I went to school by bus, because I got up late.

My best friend Mike didn't come to school today. He went swimming yesterday and had a cold. The

doctor asked him to stay in bed and take some medicine. After class, John and I went to visit Mike. 

He is much better. I hope he can go to school tomorrow.   

1. I usually go to school         .              

A. by bus              

B. on foot   

2. I went to school by bus this morning because _      .              

A. I got up late        

B. I had a cold

3.Mike       _ yesterday.              

A. went shopping    

B. went swimming  

4. John and I went to         .

A.the hospital      

B. visit Mike  

5. How does Mike feel now? 

A. He is angry.      

B. He is better.

小杨在数学课上的表现一直不佳。当老师在课上布置练习的时候发现小杨对应用题的理解毫无进展。
“加油，小杨。我知道你能做出这道题的。”老师在小杨耳边低语，“好好花上几分钟仔细阅读题目，然后把题目分解成好几部分，等一下我会过来看看你做得怎么样。”
几分钟后，老师回来问道：“怎么样”
小杨还是不太清楚，但是显然他已经开始摸到了问题的关键，并开始动手解答，他说：“他们想知道这单价降低的百分比。”“很好，你还知道了些什么”老师笑着说。
当小杨开始解释他对问题的理解时，老师不断地问相关的问题让他回到合适的思路上来。当他终于解决了问题后，老师笑着说：“太棒了，我知道你很努力，你现在再重新看看我们是怎么一步步地解决这个问题的，过几分钟，我会再来看看你最终的解答，好吗”
最后，小杨自己解答了这道题。
请分析老师对学生学习动机的影响。