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Chaffey High School Home

About Us

The Chaffey Joint Union High School District serves the communities of Ontario, Montclair, Rancho Cucamonga, and portions of Fontana, Upland, Chino, and Mount Baldy. With over 25,000 students, the District is the fourth largest high school district in California. It has eight comprehensive high schools, a continuation high school, an online high school, a community day school, an adult school, and alternative programs. The District offers a wide variety of instructional options that provide a quality education for each student, every day. The District's well-prepared, dedicated, and highly qualified teachers and support personnel are second to none.
The Chaffey Joint Union High School District Board of Trustees are steadfast in the belief that "Nothing is more important than student learning and their achievement."
Our daily purpose encompasses our commitment:
"To provide student learning, and ultimately their achievement, of the prescribed curriculum that takes place in the classroom under the direction of the teacher." The Chaffey District supports this daily act. We realize that our efforts uniquely influence the future of our community and of this nation, and we are passionate about doing whatever it takes to prepare students to be successful and contributing citizens of the 21st century.
The Chaffey District has provided a quality education for high school students in the area since 1911. As the District continues to grow and progress, we are poised to meet the challenge of providing the finest quality education possible for every student. 
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All CJUHSD students will graduate ready for college and careers.

Recent News

3rd Annual Teen Summit

3rd Annual Teen Summit

Calling all high school teens! It's time for the 3rd Annual Teen Summit. Please join us for this free event.

Attention: Class of 2021

March 2nd is the deadline to apply and guarantee maximum financial aid for college, but if you are late, you can still submit your application and may receive financial aid after the deadline until June 30.

Upcoming Events

School Facts

  • 55% of Chaffey High School graduates meet the University of California and California State University A-G admissions requirements, making it a leader in San Bernardino County.
  • 85% of freshmen at Chaffey High School complete their first year of high school on track to graduate.
  • The CJUHSD has been named a Top Workplace by the Press-Enterprise and Inland News Group.
  • 700 Advanced Placement exams are administered to students at Chaffey High School annually.

Principal's Message

Christina Martinez, Principal
Welcome back! I hope you had a safe and restful Winter Break and that you’re excited about second semester. 2020 was a difficult year. Perhaps even a year that many of us would like to forget. Despite the changes and challenges, there are blessings to be found. Whether it was more time spent with family, or renewed hope for racial justice in our community and in our world, 2020 has shown us that we have the power to change for the better--body, mind, and spirit. As we head into 2021, let’s prepare ourselves to make the most of the new possibilities and opportunities that lie ahead.
If you haven’t already given some thought to your New Year’s resolutions, I encourage you to reflect and set some academic and personal goals. Remember: you are starting fresh. You have resources available to you and people at school who love and care for you. Together, we can take it to a whole new level! Keep in mind all the support that is within your reach:
●       Office Hours from 8:00- 8:30am and 2:00-3:00pm, Tuesday through Friday
●       Support time built into 90 minute block
●       2nd  period check-in EVERY Monday
●       Your counselor
●       Your principal!
Stay strong, focused, and continue to strive for excellence in all areas of your life.
As a reminder, we are starting 2nd semester in a distance learning format. There are some changes to the bell schedule based on input from staff and students. Please review the revised bell schedule so that you know what to expect. I will continue to keep families informed of any updates to the school program through Canvas e-mail and the Sunday call.
Lastly, please be aware that school is not in session on the following dates:
January 18th  – MLK JR. Day
February 8th – Lincoln’s Day
February 15th – Presidents Day
Tigers, I can’t wait to see the amazing things you will accomplish in 2021!
Christina Martinez
Principal, Chaffey High School