Being a substitute teacher requires the ability to adapt to different children of varying ages every day. Keller Independent School District is a growing school district that has exemplary schools from the several elementary schools to their three high schools. Due to teacher training, illness and required meetings, all school campuses need substitutes throughout the year. Follow these steps to become a substitute in one of the best school districts in North Texas. Pick up an application from the Keller ISD Human Resources office located at 350 Keller Parkway, Keller, Texas. Fill out the application and return it to the district address that is listed on the district Web site (see the Who Can Help section below). Submit a sealed, certified copy of your transcripts from college along with the application. Present a valid driver’s license and Social Security card for confirmation of identity. The district will run a criminal background check with your information. Attend the orientation