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School Profile

CEEB: 052987
6001 Milliken Ave.
Rancho Cucamonga, CA 91737

(909) 477-6900 (909) 460-5872 (fax)
Accredited by the Western Association of Schools and Colleges (WASC)
A California Distinguished School

Principal: Joshua Kirk
Assistant Principals: Michelle Boyette, Nora H Farraj, Linda Hanford, Thomas Mitchell
Susan Forbes A-Ca
Kelly Shaw Ce-Fo
Cynthia Deiner Fr-Je
Lindsay Fotia Ji-Mba
Kevin Morris Mc-Q
Jim McDonald R-Sto
Richard Revard Str-Z


Los Osos High School is one of eight comprehensive high schools within the Chaffey Joint Union High School District. The school is located in the suburban, predominantly middle-class community of Rancho Cucamonga. The majority of families live in single-family homes. Many parents commute to work out of the area.

The physical plant consists of six buildings including a 1,250 seat theater and stadium with a seating capacity of 4,000. The school is designed to accommodate 2,600 students. At this time the school is serving close to 3200 students.

The student population of Los Osos is 40% white with the second and third largest sub-group population being Hispanic and African-American. Those students eligible for free and reduced lunches make up 17% of the school population; 56 students are Limited English Proficient.

All students study the district mandated core curriculum and follow the established graduation requirements.

The majority of funding comes from the district’s general fund. The categorical monies are Title III LEP and EIA/LEP.

Each class is 56 minutes except for period two when there is an additional six minutes for the announcements. Each Friday is a late start day when meetings, collaboration and staff in-services are scheduled. The only minimum days scheduled are the day after Back-To-School Night in August, and three at the end of each semester for school-wide final examinations.

In addition to the core and elective courses taken by our students, the school offers a full athletic program, as well as instrumental, vocal music, drama and dance.


English 4 years; Mathematics 2 years; Physical Science 1 year; Life Science 1 year; World History 1 year; US History 1 year; Physical Education 2 years; Government 1 semester; Economics 1 semester; Foreign Language or Fine Arts 1 year; Computer Studies 1 semester; Focus Area (taken from Fine Arts, Business Education, Home Economics, Industrial Technology, Foreign Language)
2 years; Electives 4 years (65 or 70 credits).


HONORS/Advanced Placement Courses
19 AP Courses in:

19 AP Courses in: AP Biology,
AP Calculus, AP Chemistry, AP Computer Science,
AP Economics, AP English Literature, AP English Composition, AP French, AP U.S. Government, AP Latin, AP Physics, AP Psychology, AP Seminar, AP Research, AP Spanish Language, AP Spanish Literature, AP Statistics, AP U.S. History, AP World History.


7 Honors courses in: Int Math I/II, Int Math II/III, English I, English II, Geometry, Pre-Calculus, Biology I


Five credits are granted for completion of semester courses. 2.5 credits are granted for quarter courses. Students normally are enrolled in 6 classes each semester.

Rank is calculated at the end of every semester grading period using the grade point average of all marks earned in grades 9, 10, 11 and 12. Rank is weighted with extra points given in Honors and AP courses.


Grade Honors/AP
A = 4 5
B = 3 4
C = 2 3
D = 1  
F = 0  


Athletics – LOHS has a comprehensive athletics program that includes nineteen sports. It competes at the highest levels of athletics offered in California. In its short history, Los Osos has won 65 Baseline League championships. There have been three C.I.F. individual champions and 9 C.I.F. championships in both Boys and Girls Water Polo, Boys Swim and Girls Soccer. We have also had sixteen CIF finals appearances. Along with these accomplishments, Los Osos has state of the art facilities that include a 3200 square foot weight room, 4000 seat stadium, all-weather track, turf football field, an Olympic sized pool and a college level training room. In addition, there are twenty-two on-campus teachers/coaches.

Publications – Los Osos High School’s journalism course seeks to develop well-rounded journalists and highly experienced editors who are trained to engage and question the world around them responsibly, reasonably, and creatively. The goal of the course is to prepare students with the skills necessary to pursue college level journalism, and it requires students to practice daily in order to meet the goal in an academic but enjoyable manner. The course, furthermore, is designed to publish an eight page monthly newspaper, The Grizzly Gazette. Newspaper articles cover a wide variety of topics from a student’s perspective. Well-informed and well-educated, Grizzly Gazette journalists provide the student body with accurate and reliable information, thereby serving our school campus and our surrounding community.

Band and Color Guard – The Los Osos Band & Color Guard Program has even in its brief existence built a reputation as one of the finest musical organizations in Southern California. The concert bands have consistently earned “Superior” ratings at music festivals throughout the state. The Jazz Band has appeared at the Reno Jazz Festival and has earned recognition at a variety of festivals and popular venues throughout the region. The Color Guard and Winter Guard have consistently been medalists in the championships sponsored by the Winter Guard Association of Southern California and The Los Osos Marching Regiment has twice appeared at the Fiesta Bowl National Band Tournament and the Fort McDowell Fiesta Bowl Parade in Phoenix, Arizona, and earned top music and marching awards at both of those events. The Marching Band has won the Las Vegas Invitational 3 times and in 2007 and 2012 won the 5A division marching band championship in Southern California..

Library Media Center – The goal of Los Osos High School Library Media Center (LMC) is to ensure that students and staff are effective users of ideas and information, and to inspire a love of reading. The library plan is to support the curriculum by providing appropriate print and non-print materials, to provide opportunities for students to use current technology, and to provide opportunities for students to read and study. Classes visit the LMC daily to utilize the two computer labs and to take advantage of over 14,000 library and reference books. Students can also visit the library before school, during lunch, and after school. Free tutoring is available during those times.

SAT, ACT, API and AP Data



  # of students tested Critical Reading Math Writing
12-13 515 520 542 512
13-14 531 511 532 506
14-15 522 523 544 511




  # of students tested English Reading Math Composite
12-13 183 23.0 23.7 24.6 23.6
13-14 198 22.5 23.6 23.9 23.2
14-15 180 22.7 23.5 24.5 23.5




2012 API 2013 API 2014 API
849 845 845


2015 CAASPP SBAC Results

Standards Met & Exceeded ELA Math
  72% 53%




  Total # of Exams Total # of Students who Passed with 3 or Better Percentage Passed
12-13 1,334 713 68%
13-14 1,539 728 64%
14-15 1,641 1035 63%