The class of eighth graders at a Los Angeles middle school tap their rulers and nod their heads to the rhythm of the rap video projected on a screen. It's not Snoop Dogg or Jay-Z.
It's their math teacher, LaMar Queen, using rhyme to help them memorize seemingly complicated algebra and in the process improve their grades.
"It gets stuck in your head," says Cindy Martinez, a 14-year-old whose math grade went from a C-average to a B.
Queen, 26, is now known at Los Angeles Academy as the rap teacher, but his fame has spread far beyond the 2,200-student school in this gritty neighborhood. He's won a national award and shows teachers and parents how to use rap to reach children.
"Math is a bad word in a lot of households," he says. "But if we put it in a form that kids enjoy, they'll learn."
Queen is doing what many veteran educators have done -- using students' music to connect with them. Where teachers once played the rock n' roll tunes of "Schoolhouse Rocks" to explain everything from government to grammar, they now turn to rap to renew Shakespeare or geometry.
"Rap is what the kids respond to," Queen says. "They don't have a problem memorizing the songs at all."