参加学校英语作文的写作要点如下：

活动背景

可以简要介绍活动的名称、日期和地点。例如：“Last Friday, our school organized a visit to the Science and Technology Museum.”

活动内容

详细描述活动的内容和过程。例如：“We saw many interesting scenes of experiments, such as how to drive a car, how to make an engine start, why a lamp gives light, and why water flows down.”

个人感受

表达自己在活动中的感受和收获。例如：“I liked driving a car. It was an interesting day. I learned a lot from the visit.”

活动的意义

阐述活动对个人的意义或对学校的影响。例如：“The museum visit was very informative. It broadened my horizons and inspired me to learn more about science and technology.”

结尾

可以总结活动并表达对未来活动的期待。例如：“I look forward to more such exciting field trips in the future.”

Title: My Experience at the Science and Technology Museum

Last Friday, our school organized a visit to the Science and Technology Museum. We went there by coach. The museum is very big, and we saw many interesting scenes of experiments, such as how to drive a car, how to make an engine start, why a lamp gives light, and why water flows down. We participated in some experiments. I liked driving a car. It was an interesting day. I learned a lot from the visit. The museum visit was very informative. It broadened my horizons and inspired me to learn more about science and technology. I look forward to more such exciting field trips in the future.

希望这个示例能帮助你写出一篇优秀的参加学校活动的英语作文。