A substitute teacher, filling in for a teacher on extended leave, asked students to research Keef, according to the Chicago Sun-Times. "I had never heard of him. But after careful research I found out that his music is about having sex, using the 'B' word, anti-police and supporting gangs," parent Katrina Sanders told the Sun-Times.

'What happened to the musical composers? The music that this teacher is presenting is the very thing that the children don't need: profanity, drugs and acting as if being arrested is a badge of honor."

A spokeswoman for the Chicago Public Schools sided with the parents. "This inappropriate project was immediately suspended by the principal as soon as she learned about it. While teachers have flexibility in making assignments, CPS requires them to provide age-appropriate material in the classroom," spokeswoman Emily Bittner said.