Skip to main content

Ontario High School

Chaffey Joint Union High School District

  • Make changes to the header and footer on the "Edit Header and Footer" tab on the left.


    Mr. zaldivar

    Mr. Zaldivar


    Principal's message

    Hello Jaguar Family!

    Spring break is around the corner and our students will be taking several assessments/tests in April and May.

    Testing information:

    • 12th grade students will be taking the California Science Test (CAST- All seniors will take the exam during the week of April 15-18.
    • 11th Grade- California Assessment of Student Performance and Progress (CAASPP) -All 11th grade students will take this exam and will be taken on a computer. Our students use computers on a daily basis and will be well prepared!
    • 11th grade English-  April 8-11
    • 11th grade Math-  April 15-18.
    • Early May- Advanced Placement (AP) tests- students taking these exams will have the opportunity earn college credit should they earn a score of 3,4, or 5 on the exam

    Please remember that we have tutoring after school, Monday-Thursday and our library is be open from 2:30-4:30 p.m. Monday-Thursday.

    We are proud of our students' hard work and I know that our teachers are properly preparing our students for their exams.

    I encourage you to explore California’s school accountability system, the California School Dashboard which outlines our school’s progress in several areas, including graduation rate and college/career at CA Dashboard.

    It is an honor to work with you to prepare our students for the future!


    Mr. Zaldivar
    Twitter @OntarioHS

    Follow us on twitter


    Cal Baptist signing MOU with Mat Holton

    guaranteed admissions agreement signed with cbu!

    Mathew Holton, Superintendent, and California Baptist University Provost, Dr. Charles Sands, recently signed our newest admission agreement! All CJUHSD graduates who meet the mutually agreed upon admission requirements, will be able to enroll and attend this progressive university. One of the amazing highlights of this agreement is the commitment of CBU to provide a minimum of $8,000 per academic year in combined scholarships and grants to all our students! We are very excited to provide this opportunity for our students to attend this university in Riverside, California. This agreement, along with the previous agreements with Cal State San Bernardino, Cal Poly Pomona, Cal State Bakersfield, University of Redlands, University of La Verne, Azusa Pacific University, and Grand Canyon University continue to provide an advantage to the students of the Chaffey Joint Union High School District to pursue their dreams for the future!

    CJUHSD Signed MOU's