Now MIT plans to release a fresh batch of open online courses—and, for the first time, to offer certificates to outside students who complete them.

This year, MIT OCW celebrates its 20th anniversary, presenting a collection of materials from 2,500 courses led by 1,700 faculty members. The materials are used by middle and high school kids, by ...

When he was just 15, the Mongolian wunderkind Battushig Myanganbayar earned a perfect score in MIT’s first massive open online course, or MOOC.