Online discussions are both a promise and a peril for teaching and learning in online, hybrid, and face-to-face classes. Discussions offer great potential for student-student interaction and collaboration, as well as for student and instructor engagement. But, discussions can also easily overwhelm both students and teachers with seemingly endless unread posts to read, reply to, and assess. Participants will learn how to design and implement online discussion assignments that foster engagement and learning while being meaningful and sustainable for both students and faculty. This presentation will highlight the role online discussions can have in promoting Active Learning in online, hybrid, and face-to-face classes.