Britney Spears is heading back to school.

The 33-year-old pop star, whose Las Vegas residency is earning a whopping $50 million a year, recently revealed she’s taking math classes to keep up with her sons’ homework.

“They go to a really hard school, and this week we had three hours of homework [a night],” Spears told People magazine of 9-year-old Sean Preston and 8-year-old Jayden James’ grueling evening schedule.

“Some of it is hard for me,” she added. “Next year when [Preston’s] in fifth grade, he’s going to be doing pre-algebra, and I’m taking classes so I know how to do it!”

For the Louisiana-born singer, who’s currently dating Charlie Ebersol, homework is a priority.

But Spears, who has clearly done all right for herself financially since starting a career in 2000, is not keen on spoiling her kids.

In fact, she limits the toys and cash her sons receive.

“If they get so many A’s, they get one toy a month,” Spears said of her family’s incentive system.

The boys also pitch in around the house — pulling their weight when it comes to washing their own dirty dishes, taking out trash and helping with the family’s dogs.

“Preston just asked for a high allowance like $10 a week or $20 a week — but we’ll see,” she detailed.

When the topic of more kids arises, the “Toxic” singer flirts with the idea of having a “mini-me” someday.

“That would be fun,” she beamed.

This article originally appeared in the New York Post.