Are there any short plays suitable for high school students?

Yes, many famous short plays can be rehearsed.

We once studied in junior high school, such as Thunderstorm, Teahouse, Merchant of Venice, Waiting and so on.

If you like China's plays, you can search Cao Yu, see what you like, and then choose.

Those who like foreign countries can watch William Shakespeare's plays, and there are many choices.