Complex sentence: During her years attending Homewood-Flossmoor High School in Flossmoor, Ill., Okorafor was known for being a star athlete tennis player and dominant in science studies, regarding the academic material as an engaging hobby more than a task.
Split into simpler sentences: During her years attending Homewood-Flossmoor High School in Flossmoor, Ill., Okorafor was known as a star tennis player and excelled in science. At the time, she regarded academic material as an engaging hobby more than a task.