You can use the Asynchronous Debate relating the topic to the students' prior experience/readings/societal or global issue. Alternatively, you can use their favourite Social Media platform and have critically analyse a current issue relating to the course using relevant theory. These two linked resources can be helpful in illustrating the latter:
Conference Paper Debating: A Dynamic Teaching Strategy for Motivating Student...
Conference Paper Social Media in Education: Bringing Your Classroom to Life -...