She began her secondary education in 1886 at a high school for girls in Novi Sad, but changed the following year to a high school in Sremska Mitrovica. Beginning in 1890, Marić attended the Royal Serbian Grammar School in Šabac. In 1891 her father obtained special permission to enroll Marić as a private student at the all-male Royal Classical High School in Zagreb. Her mathematics teacher was Vladimir Varicak. She passed the entrance exam and entered the tenth grade in 1892. She won special permission to attend physics lectures in February 1894 and passed the final exams in September 1894. Her highest grades were in mathematics and physics, both "very good", one grade below the highest "excellent". That year she fell seriously ill and decided to move to Switzerland, where on November 14, she started at the "Girls High School" in Zurich. In 1896, Marić passed her Matura-Exam, and started studying medicine at the University of Zurich for one semester.