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

WeTip - Be the solution


Be the Solution. If you have information regarding crime or misconduct at your school, call WeTip anonymously.

The Chaffey District Cares

The Chaffey District cares about your mental well-being. We partner with community agencies and mental health professionals to provide support to our students and staff. If you, or someone you know, is in crisis please contact the Community Crisis Response Team (909) 421-9233 - Click 'Read Full Story' for more information.

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
We are so close to the finish line…but we are not there yet. As we enter the 4th quarter, I want to encourage ALL students to finish strong. You have worked so hard in and out of the classroom and I am proud of what you have accomplished. 
As we gear up for the final push to the end of the school year, we have important events coming up such as CAASPP/CAST, AP Exams, prom, and commencement.
We take pride in our school and the development of our students’ academic success. This is why our staff has been working hard to prepare students for the upcoming CAASPP and AP exams. These are just two of the indicators that are used by the state to measure the overall success of the school. 
Juniors will take the CAASPP, Seniors will take the CAST (California Science Test), and many of our students in grades 9-12 will be taking AP Exams. Show us you’re ready, Tigers!
Testing Dates:
CAST for all 12th grade students
              April 2--5

CAASPP for all 11th grade students
              April 8-16

AP Testing
              May 6-17
Our spring sports season is also underway.  CHS Baseball, Softball, Boys Volleyball, Golf, Swim, Boys Tennis, and Track & Field teams are ready for competition. In addition, our Fine and Performing Arts programs are preparing for our production of Sweeney Todd, the Demon Barber of Fleet Street and several spring concerts and performances by our talented student groups. Come out and support our Tiger athletes, performers, and scholars.
Students, I encourage you to continue to do your personal best. Strive to stay on track to meet the A-G requirements and other academic goals you set for yourself and make time to take care of your mental and emotional health. The Chaffey High School staff are here for you. Let us know how we can help.
Go, Tigers,
Christina Martinez