As her popularity as a singer grew, the demands of Selena's performance and travel schedule began to interfere with her education. Her father took her out of school when she was in the eighth grade. Her teacher Marilyn Greer disapproved of Selena's musical career. She threatened to report Quintanilla, Jr. to the Texas Board of Education, believing the conditions to which Selena was exposed were inappropriate for a girl her age. Quintanilla, Jr. told Greer to "mind her business". Other teachers expressed their concerns when they noticed how tired Selena appeared when she arrived at school. At seventeen, Selena earned a high school diploma from the American School of Correspondence in Chicago and was also accepted at Louisiana State University. She enrolled at Pacific Western University, taking up business administration as her major subject.