the more recent conservationist movement (as typified by the Hill Country Conservancy), and eventually the current ongoing debate about "sense of place" and preserving the Austin quality of life. Much of the environmental movement has matured into a debate on issues related to saving and creating an Austin "sense of place." In 2012, Austin became just one of a few cities in Texas to ban the sale and use of plastic bags. However, the ban ended in 2018 due to a court ruling that regarded all bag bans in the state to contravene the Texas Solid Waste Disposal Act. Education According to the 2015–2019 Census estimates, 51.7% of Austin residents ages 25 and over have earned at least a bachelor's degree, compared to the national figure of 32.1%. 19.4% hold a graduate or professional degree, compared to the national figure of 12.4%. Higher education Austin is home to the University of Texas at Austin, the flagship institution of the University of Texas System with over 40,000 undergraduate students and 11,000 graduate students. Other institutions of higher learning in Austin include St. Edward's University, Huston–Tillotson University, Austin Community College, Concordia University, the Seminary of the Southwest, the Acton School of Business, Texas Health and Science University, University of St. Augustine for Health Sciences, Austin Graduate School of Theology, Austin Presbyterian Theological Seminary, Virginia College's Austin Campus, The Art Institute of Austin, Southern Careers Institute of Austin, Austin Conservatory and a branch of Park University. The University of Texas System and Texas State University System are headquartered in downtown Austin. Public primary and secondary education Approximately half of the city by area is served by the Austin Independent School District. This district includes notable schools such as the magnet Liberal Arts and Science Academy High School of Austin, Texas (LASA), which, by test scores, has consistently been within the top thirty high schools in the nation, as well as The Ann Richards School for Young Women Leaders. The remaining portion of Austin is served by adjoining school districts, including Round Rock ISD, Pflugerville ISD, Leander ISD, Manor ISD, Del Valle ISD, Lake Travis ISD, Hays, and Eanes ISD. Four of the metro's major public school systems, representing 54% of area enrollment, are included in Expansion Management magazine's latest annual education quality ratings of nearly 2,800 school districts nationwide. Two districts—Eanes and Round Rock—are rated "gold medal," the highest of the magazine's cost-performance