同学们，实践是检验真理问题的唯一标准，运用你们学到的知识实践检验一下能力提升了吗?

The reasonable objective principle must be combined with the student-centred principle to achieve teaching goals. Explain the differences in the teaching objective at elementary, junior middle and senior middle school when dealing with the topic on sports.

●写作样例：

When teaching elementary students the topic of sports, teachers should impart to them some everyday sports activities such as badminton, ping-pong, running and swimming. Besides, students should be able to make one or two sentences with these activities, for example, I like ping-pong. No written work should be involved in this stage. While teaching junior students the topic of sports, teachers should extend sports activities to a wider range and the expressions and sentences involved should be more various. Students should use more complicated sentences to express their sports preference, such as my favorite sports is...; I prefer...to...and so-on. And, they should also be able to develop dialogues in sports. When it comes to teaching senior school students the topic of sports, dialogues should not only be longer in length, but should be deeper in depth. Compositions can be used to enhance the topic.