Author: Stephanie Snyder

The city teacher behind DeltaMath, the online tool helping students learn (but not cheat)

When Zach Korzyk spent a couple of days creating an online tool to teach his 11th-grade students to solve a specific math problem, he never imagined the website would expand far beyond his Manhattan classroom. Five years later, his DeltaMath website has 600 different types of math problems – each with countless variations – and was used by more than 20,000 students in December 2014 alone....