Gottfried Leibniz made conceptual advances that lie behind our digital world. Yet for centuries he was mocked for a misstep.

Some places are moving to universal early algebra. Minnesota has required it for years — with less-than-promising results.

Republished with permission from The Hechinger Report, a nonprofit news outlet focused on education. BRAHAM, Minn. — It was fourth-period Basic Algebra 8 class on a gray October morning at Braham Area ...