Montclair 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. 
About Us Image
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

  • 69% of Montclair High School graduates meet the University of California and California State University A-G admissions requirements, making it a leader in San Bernardino County.
  • 88% of freshmen at Montclair 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.
  • 1000 Advanced Placement exams are administered to students at Montclair High School annually.

Principal's Message

Mr. Cho
Dear Montclair Cavaliers,

We are off to a great start to the new school year and we are buzzing with activity all throughout campus. Our teachers are fully invested in offering a robust and dynamic instructional environment, and we look forward to helping our students succeed. This year’s theme of GO BIG focuses on not letting anything get in the way of striving to achieve our academic and extracurricular pursuits. Exciting times are ahead!

Montclair High School offers a number of programs that support our students in their academic journey. Our Cav Academy provides a built-in intervention period Monday through Thursday. We are continuing with Extended Learning Opportunities courses during 0 and 8th periods. We offer MAST tutoring sessions in various subjects before and after school. Our CAP Saturdays will allow students additional time for students to interact with their teachers. The Paper tutorial program provides 24-hour online assistance for our students who log in and connect through the portal. Parents can also utilize AERIES, Canvas, and Parent Square to communicate with teachers, to monitor attendance, and to stay up to date with student academic progress.

Even with an academic focus, we encourage all Cavaliers to look beyond their classrooms and connect with the vast array of clubs, sports, and other extracurricular organizations associated with Montclair High School. Research continuously confirms that students who get involved on their campus are more successful in their classes. We are confident that there is something for every student, and we encourage everyone to explore everything that our site has to offer!

Our school continues to seek excellence in all areas to provide the best possible educational experience for our students. The California Dashboard is our state’s school accountability system. The data that is provided helps identify schoolwide strengths and growth areas. This information can be found on CA Dashboard.

Thank you for your continued support as we plan to make this school year the best in history!

Go, Cavs!

Your proud principal,
Joshua Cho