Britney Spears taking math classes to teach children

“They go to a really hard school, and this week we had three hours of homework (a night). Some of it is hard for me. 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,” she said.

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The singer said she has kept a reward system to motivate her sons, reported People magazine.

“Homework is a priority, and we have a reward system that helps motivate them. If they get so many A’s, they get one toy a month,” she said.