Excel High School offers convenient and affordable online options to complete a State recognized, regionally accredited high school diploma online. All courses come complete with State Certified Instructors and everything you need to graduate high school online. Our online high school diploma programs are self-paced, and can be completed at your own pace. Excel High School is Regionally Accredited by AdvancED and the North Central Association CASI. Excel High School is a part of the Excel Educations Systems Independent School District.