Open up a classic mathematics textbook written by a Welshman, Robert Recorde, and flip past the preface and the table of contents. There, you'll see the bold statement that math is "contemptible and ...

To understand why, the team looked at the MRI scans.

Learning math takes effort and can even feel uncomfortable, but moments of struggle and mistakes are part of the process. Research shows that productive struggle in math leads to better learning. But ...