Eastside High School.

About Eastside High School

Eastside High School is located in Lancaster, California, and is part of the Antelope Valley Union High School District. Eastside is the 8th and newest school in the district. The school opened to freshmen in August 2005, with the first class graduating in May 2009. Before May 2009 the school was housed in portables. Classes are now held at the newly constructed site adjacent to the former site. It is a public school that serves 2592 students in grades 9-12. A school's Academic Performance Index (API) is a scale that ranges from 200 to 1000 and is calculated from the school's performance in the California Assessment of Student Performance and Progress (CAASPP) Program. The state has set 800 as the API target for all schools to meet.