We've all seen it happen. You're in the middle of your lecture, teaching the finer points of this particular state standard, unlocking the mysteries of the universe (or at least the next standardized test), and you look up and see this:
Yes. The desks are occupied by zombies. The virus spreads rapidly. You know if you don't bust the boredom quickly, you'll have lost them all.
Even adults can listen to a lecture only about 12 minutes before their attention is spent. And students really can't listen to you if they're trying to take notes. So we know we need to break up the lecture and give students opportunities to make sense of what they've just heard.
These strategies are easy-to-employ ways to spice up any lecture or presentation or check for understanding at the conclusion of a lesson. Most require few, if any, special supplies and encourage students to really think deeply about your content. And all give you opportunities to gauge what your students are understanding.