Skip to main content

Colony 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. 
Read More
Colony High School campus photo
All CJUHSD students will graduate ready for college and careers.

Recent News

Finals Schedule

Please see attached document for the Fall finals schedule.
Show All News

Upcoming Events

Board Meeting

Time: 5 PM – 8 PM
Location: Alternative Education Center

Board Meeting

Time: 5 PM – 8 PM
Location: Alta Loma High School
Show All Events

School Facts

  • 65% of Colony High School graduates meet the University of California and California State University A-G admissions requirements, making it a leader in San Bernardino County.
  • 90% of freshmen at Colony 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.
  • 900 Advanced Placement exams are administered to students at Colony High School annually.
Placeholder text, please change
Placeholder text, please change
Placeholder text, please change
Placeholder text, please change
Placeholder text, please change
Placeholder text, please change
Placeholder text, please change
Placeholder text, please change
Placeholder text, please change
Placeholder text, please change
Placeholder text, please change

Principal's Message

Portrait of Dr. Tiffany Bunn
Dear Titan Families,
 
As we approach the end of the semester, we want to pause and truly honor the incredible effort, perseverance, and growth our students have shown. This time of year offers a meaningful moment for reflection—an opportunity for students to recognize how far they’ve come and prepare to finish the semester with confidence and pride.
 
In the days leading up to finals, students will take part in Scholar Week during Titan Academy. This purposeful time allows them to slow down, focus, revisit concepts, complete assignments, and seek guidance from teachers. It’s a chance for them to strengthen their understanding and walk into finals feeling ready and supported.
 
Final exams will take place December 17–19, with minimum days from 8:30 a.m. to 12:50 p.m. We encourage students to begin preparing early by reviewing notes, completing study guides, asking questions, and creating healthy routines that support both the mind and body. Rest, nutrition, and balance go a long way in helping students stay centered during this important stretch.
 
We are also excited to begin our No Cell Bell-to-Bell practice. By keeping cell phones and electronic devices put away during class, students can be fully present, actively engaged, and more connected to their learning community.
 
This practice helps open the door to richer discussions, stronger collaboration, and deeper relationships with peers and teachers. Students may still use devices before school, during passing periods, at lunch, and after school. We believe this shift will support meaningful learning—especially as students prepare for finals.
 
Families play such an essential role in this process. Your encouragement, routines at home, and gentle check-ins help students feel capable, grounded, and supported. We are deeply grateful for your partnership and the love you pour into your students each day.
 
As we wrap up the semester, please know how proud we are of each and every Titan. We wish you and your families a peaceful, restorative, and joy-filled winter break. Thank you for your continued support, and we can’t wait to welcome everyone back for a strong and inspiring start to the new year.
 
With gratitude,
 
Dr. Tiffany Bunn, Principal
Colony High School
Read More