Harmony Public Schools | 36,529 followers on LinkedIn. A Texas-born, Texas-wide charter public school system offering a free, nationally-recognized, STEM-focused education. | Harmony Public Schools is a network of PreK-12 college preparatory public charter schools across Texas. For more than two decades, our schools have provided students from under-served communities the opportunity to excel in their studies in a small classroom environment focused on providing the skills they need to succeed in life. The Texas-based non-profit organization was established by a group of dedicated educators and university academicians who were passionate about the way children approached math and science.