CHICAGO (AP) — Dorothy Jean Tillman II’s participation in Arizona State University’s May 6 commencement was the latest step on a higher-education journey the Chicago teen started when she took her first college course at age 10. In between came associate’s, bachelor’s and master’s degrees. When Tillman successfully defended her dissertation in December, she became the youngest person — at age 17 — to earn a doctoral degree in integrated behavioral health at Arizona State, associate professor Leslie Manson told ABC’s “Good Morning America” for a story Monday. “It’s a wonderful celebration, and we hope ... that Dorothy Jean inspires more students,” Manson said. “But this is still something so rare and unique.” Tillman, called “Dorothy Jeanius” by family and friends, is the granddaughter of former Chicago Alderwoman Dorothy Tillman. When most students are just learning to navigate middle school, her mother enrolled Tillman in classes through the College of Lake County in northern Illinois, where she majored in psychology and completed her associate’s degree in 2016, according to her biography.