1. Teaching is an interactive performance that can evoke curiosity in students by exposing gaps, teasing without spoiling answers, and taking time to build frustration and boredom. 2. Curiosity is a powerful hook that can engage students if used responsibly by planting mysteries and exposing gaps to scratch an itch without satisfying it immediately. 3. Building curiosity is preferable to surprise and takes time but can be an effective way to engage students in learning.