A key part—though surely not the only part—of early-grades math is ensuring students get the basic arithmetic functions down and, beyond that, making sure they’re able to swiftly and automatically ...

You scrambled up a Rubik’s cube, and now you want to put it back in order. What sequence of moves should you make? Surprise: You can answer this question with modern algebra. You might remember ...

I got an A in algebra II, I think. That was long ago. I do know that I have long since forgotten whatever I learned in that course and have never used it since. Later, he explains what mathematics is ...

Algebra is all about missing values or numbers. If you have solved a missing box problem, you have already solved an algebra equation. Rather than drawing missing boxes or writing the words “missing ...