Link: https://poe.com
poe.com allows you to create a chat bot that will only answer questions within the given realm that you set it. i.e. you can create a chatbot that will only answer questions about topics within your course. You can choose which language model to use and have your students use your own chatbot rather than a more broad large language model.
FIPPA Compliance Caution:
Care should be taken when using this tool, especially around the use of student data – servers are (as of this writing) not located in Canada, and so this tool is not FIPPA (Freedom of Information and Protection of Privacy Act) compliant.