Here’s a simple number game to play on a rainy day, or while sheltering in place. You and I take turns crossing out numbers from the list {1, 2, 3, …, 9}. The winner is the last person to cross out a ...

Want to help your 11th-grader master math? Here are some of the skills your student will be learning in the classroom. For high school students, math skills and understandings are organized not by ...