The Mesquite Independent School District is a school district in Mesquite, Texas (USA) (incorporating most of Mesquite and portions of Balch Springs, Dallas, Garland, and Seagoville, as well as formerly serving all high school students of Sunnyvale) which follows the standard definition of an independent school district. The district contains over 35,000 students. There are five main high schools, Three of which are AAAAAA (or 6A, the highest in a system of Texas school size classification). As of July 1, 2015, the superintendent is Dr. David Vroonland.