Piazza is a free platform for instructors to efficiently manage in-class questions and answers. Students can post their questions and collaborate to edit responses to those questions. Instructors can also answer questions, endorse student answers, and edit or delete any posted content.
With built-in LaTeX equation editor and code blocking, Piazza can be especially beneficial when applied to STEM classes.
Refer to Piazza Support Center for more information and instructions on how to register for and use this platform.
Please noted that Piazza is not a closed system, in which you would need to be careful with the student data.