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

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
Dear Parents and Students,
Thank you for a strong start to the 2020-2021 school year! We are almost half-way through the first quarter and I want to encourage you to keep pushing forward. While we are in a distance learning format, and even when we transition to a hybrid model, we will continue to encounter new challenges, develop new skills, and amaze ourselves as we develop our expertise in navigating this digital world we find ourselves in. Thank you for your persistence and your patience.
Tigers, no matter the format—virtual or in person—attendance is critical to your success. Make sure that you are following the bell schedule, attending your Zoom meetings on your designated days, participating in class discussions with your cameras on, and turning in your assignments on time.
Another key to success is communication. Especially while we are in a distance learning format, it is easy to lose touch and fall behind. Your Chaffey Family is here to help you stay connected and provide you with the resources you need to be successful. Please make sure that you are using our 3 primary technology platforms—Outlook, Canvas, and Zoom. Check the “Resources” tab on our school website for information about technology support, mental health services, and more. CHS continues to offer extended learning opportunities. Please communicate with your teachers about when they are hosting office hours and any tutoring opportunities that are available to you. Lastly, please check my Principal’s Communication course for regular emails and announcements about school events. We’ve got your back, Tigers!
This school year we remain focused on preparing students for college and career. Please refer to the CA Dashboard to see our school's accomplishments in regards to college and career readiness, graduation,  and A-G completion.
Last year, 72.7% of our seniors completed their A-G requirements and were eligible for admission to a 4- year college. This is amazing! Our data is showing us that Chaffey Tigers graduate ready for the next level and with a variety of post-secondary options.
Parents and guardians, I look forward to meeting with you at our Virtual Coffee with the Principal meetings. This is my chance to share school news and to hear your feedback. The first Coffee with the Principal will be on Wednesday, September 9, via Zoom. Please check the Parent Resources tab for details and a link to our meeting. You can also follow me on Twitter @ChafeyHSTigers for up-to-date information on school events and parent engagement opportunities.
I look forward to partnering with you to make this our best year ever! 
Go Tigers,
Christina Martinez
Principal, Chaffey High School