DENVER (AP) – Malala Yousafzai has made a surprise visit to a Denver high school that offers special programs for refugee students.

The Denver Post reports the Pakistani children’s rights activist spoke at a South High School assembly Friday after students from Eritrea, Cambodia and Sierra Leone told their stories.

Her visit hadn’t been announced, and when she walked onto the stage, the audience erupted into cheers and screams.

Malala was shot and wounded by the Taliban in 2012 because she advocated for education for girls and women. She shared the 2014 Nobel Peace Prize.

She visited South High during an international tour to advocate for education access. She had heard about the school during a visit to the city in 2015.