Some platforms have laid off employees, citing the need for sustainable growth.

“I couldn’t do it anymore,” said Abby Norman, a former schoolteacher in Atlanta.

The firm, a leader in the massive open online course sector, says its enrollment more than doubled last year.

More than 70% of Black students are going to school entirely online, compared to 40% of white students.

Parents are concerned about what online learning could to do their finances and their career growth.

Here are the numbers we’re reading and watching for Tuesday.