It’s not unusual for teenagers to take a summer trip after graduating high school, but Malala Yousafzai is a bit different.

The 19-year-old Pakistani woman attended her last day of secondary school in Birmingham, England, on Friday, a milestone for the activist who has fought for girls’ education. She said on her new Twitter account that she would begin traveling next week to the Middle East, Africa and Latin America to meet with girls.

“I enjoyed my school years, and I am excited for my future,” she wrote in her blog. “But I can’t help thinking of millions of girls around the world who won’t complete their education.”

Ms. Yousafzai became the youngest winner of the Nobel Peace Prize in 2014, having risen to international prominence as a voice against Islamist violence. She escaped to Britain in 2012 after being shot in the head by the Taliban when she was 15.