Pleases ensure that your students are OK with flashing images, etc… and show slides accordingly. Students absolutely love these - and for many, it’s the very first time they’ve seen optical illusions. It’s so much fun to watch their expressions - “Mr. James…these hurt my brain! WOW” The slides present the illusion, and then additional slides try to break down some of the illusions and explain how they work. The PowerPoint contains over 50 illusions, and I’d suggest showing just a few at a time - maybe as a weekly or fortnightly 15 min filler. The PowerPoint also contains an embedded video with extremely powerful, moving illusions. Let me know if you have any questions or suggestions, and a BIG BIG thanks for looking (as a full time practicing teacher, I KNOW how time consuming this process can be). ALL my postings are FULLY “classroom-tested” - before I publish, my lessons are tested by both myself and colleagues, rigorously evaluated and discussed, and continually updated to maximize their effectiveness. But there is always the possibility of error and room for improvement, so do please provide constructive feedback.