Arnold O. Beckman High School is a public school in Irvine, California, United States, serving 2,443 students from grades 9 through 12. The $69 million facility was opened on August 30, 2004. The school is commonly known as Beckman and was named after Arnold O. Beckman, a scientist, chemist, and philanthropist. The school is in the Tustin Unified School District.