El Dorado Ninth Grade Academy (ED9) opened its doors to 915 students in 2010 under the leadership of Principal Troy T. Byrne. The campus became the first ever ninth grade academy in SISD. El Dorado Ninth Grade Academy currently serves close to 1,000 students.
ED9 works in conjunction with El Dorado High School by initiating exposure to student programs that will be continued at EDHS. Programs include the International Baccalaureate World School (IB) and Advancement Via Individual Determination (AVID). The surrounding community anticipates the transition from El Dorado Ninth Grade Academy to Pebble Hills High School in July 2015. The mascot for Pebble Hills High School will be the Spartan.