You're an excellent teacher.你是个很棒的老师. Your material is great. 你的教材真好. Your methods are useful. 你的方法很有用. You're never dull. 和你在一起绝不会无聊. You're full of pep. 你充满活力. You keep us on our toes. 你让我们专心上课. I like your teaching. 我喜欢上你的课. I like your style. 我喜欢你的方式. You do a good job. 你教得真好.