I don’t think putting all the work for students to do is seen as the use case for teams channels - it’s for chat and discussion.
If you are trying to get students to do work, maybe use something like planner, sharepoint or any of the other myriad of tools actually designed for collaborative working rather than chat.
The intended Teams place for these things to be is either Assignments or the "_Content Library" section of a Class Notebook. Both of them are harder for teachers to use than a channel called "homework" (or just the main channel; creating a channel is hard, too).
