 In 2006 around 10,000 students attended HISD-affiliated charter schools.In 2015 there were over 125 charter school campuses in the area.KIPP Houston had 12,100 students, Harmony Public Schools's Houston-area campuses had 11,000 students, Yes Prep had 9,500 students, Houston Gateway Academy had about 1,900 students, Promise Community School had about 1,700 students, The Varnett School had about 1,700 students, and Excel Academy had 500 students.