Introduction/Background: In Emily Riehl's Topology I: Topological Spaces and the Fundamental Group, she uses a fun heads-up-seven-up style quiz to quickly engage students and test the level of confusion among the students. This activity not only helps students participate and actively take a part in their learning, but also assists the instructor in increasing the effectiveness of their lectures.
Students are asked to write down a weird or random fact about themselves on a sticky note and to pass it to the person to their left. Each student is then asked to brainstorm logically possible explanations of the fact he or she has received. Through this activity, students learn to distinguish the best or most likely explanations from all the logically possible ones.