This document discusses strategies for using interaction to reinforce concepts and increase metacognition in online mathematics classes. It suggests having students explain their thinking, justifying answers, and highlighting important discussion points. The document addresses common instructor concerns like losing class time and ensuring content coverage. It emphasizes that the instructor still guides the course while creating an engaging environment where students learn to think critically and feed themselves through interactive assignments. Examples provided include having students generate test questions or analyze "mal-rules" versus correct rules. The goal is to replicate meaningful interaction for large online classes through asynchronous activities.