It’s something that educators hear from students in classes, children express to caregivers as they start homework and even adults say to each other when it’s time to calculate the tip for lunch.

We know the struggle with mathematics—for both teachers and students—all too well. Students’ math scores, as per the “Nation’s Report Card,” have plunged to record lows. Misconceptions in early grades ...

The teaching and learning of linear algebra have evolved significantly over recent decades, underpinned by diverse approaches ranging from theoretical expositions to dynamic, model-based environments.