By law, schools aren't required to keep a student's records after they graduate.

根据法律要求，学校不需要在学生毕业后保留他们的记录。

Well, some cruel students record him sleeping in his car and share the video with their classmates.

嗯，一些冷酷无情的学生录下了他睡在车里的样子，并且和他们的同班同学分享了这个视频。

Its services include teaching math to students via video and having students record themselves doing math on a smartphone app.

它的服务包括通过视频教学生数学，以及让学生在智能手机应用上记录自己学习数学的过程。

Well, some cruel students record him sleeping in his car and share the video with their classmates. The teacher becomes the laughingstock of the whole school.

这下好了，一些无情的学生把他睡在车里的情形录了下来，并和同学们分享。这位老师成了全校的笑柄。