I couldn't remember a clock trick that I've used in third grade, in a fun situation, that helps review spelling of the numbers. I found it on this website: https://www.thespruce.com/trick-the-clock-prediction-magic-trick-2268006 . In the process, I found another trick I never thought of before. On an analog clock, the numbers directly across from each other equal 6. (I couldn't believe in all my years of looking at a clock in the classroom I never noticed this before)! Of course, this pattern would hold true for other even numbers; for example, a clock with 14 hours would have a difference of 7. Students would benefit and enjoy exploring these tricks and trying to figure out how they work. Advanced or older students might also explore the pattern beginning with an odd number such as 13.