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Los Osos High School
24 Hour Attendance Line

(909) 460-5860

Whooping Cough

The San Bernardino County Department of Public Health
Click here for information about
Whooping Cough


College Essay Writing Academy


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The Common Core State Standards Overview

Los Osos Guidance Department


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PTSA Newsletter

Patriot Day Activity

Patriot Day Activity

Hey LOHS....


The Chaffey Joint Union High School District has partnered with School Loop. School Loop is an innovative communication tool designed to keep parents, students, teachers and staff connected. With School Loop parents and students can:

  •  Check assignments online
  •  Monitor current grades
  •  Email teachers/counselors
  •  View school news/events
  •  Submit work electronically

Every Chaffey District parent and student is encouraged to register. It takes less than two minutes to sign up and all accounts are FREE! Click the 'Register Now' tab on the top left of this page.   


"We are what we repeatedly do.  Excellence, therefore, is not an act, but a habit."  --Aristotle

2014-2015 Schedule Pick-Up

Seniors Juniors Sophomores
July 22nd - 12:30-3:30
Cafeteria Lines
July 23rd - 8:00-11:00
Cafeteria Lines
July 23rd - 12:30-3:30
Cafeteria Lines

CORRECTION: Freshman Orientation - July 24th
Session 1: Last Names A-L - 8:00-11:15 in the Quad
Session 2: Last Names M-Z - 11:35-2:00 in the Quad

July 25th - 9:00-12:00 in the Guidance Office

Schedule Needs (Counselors Available):

Seniors July 29th - 8:00-9:30 in the Cafeteria
Juniors July 30th - 8:00-9:30 in the Cafeteria
Sophomores July 31st - 8:00-9:30 in the Cafeteria
Freshman July 31st - 12:30-2:00 in the Cafeteria



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We hope that all Grizzlies are enjoying their summer break and that they return rested and ready to welcome the 2014-2015 school year which begins on Wednesday, August 6th. Currently on campus we are busy preparing and planning for the upcoming year.  Please see schedule pick-up and Grizzly Freshman Orientation information listed on our website.

Los Osos High School is entering its 13th year of operation and we have so much to celebrate at this great school. In less than thirteen years our school has earned a stellar reputation of being a premier high school in San Bernardino and Riverside Counties. Our students excel in academics, athletics, the arts and activities. We do not take any of this success for granted. We understand that the success of our students has been made possible through their hard work and also because of the guidance and support provided by their family and teachers.  Together, we have been able to accomplish many grand things such as earning a California Distinguished School title.  Student learning and achievement continues to be our main focus, and we are looking forward to a wonderful year full of opportunity and promise. Many of our teachers have been spending some of their summer months taking advantage of professional growth experiences (Attending conferences/workshops, tech training, collaborative planning and course development) that will enable them to offer our students solid learning opportunities. We are now entering into our second year of incorporating the Common Core State Standards (CCSS) into our curriculum (Please see information about the CCSS on the left side of this web page). This new movement which includes the Next Generation Science Standards (NGSS) will help drive student learning as well as help to prepare our students for college and the workforce.

Each teacher and staff member is committed to maximizing student learning and achievement, and with your assistance, Los Osos can continue to achieve Grizzly excellence. Thank you for your continued support and I look forward to seeing you on campus.


Susan Petrocelli

Tutoring Opportunites

LOHS Tutoring Schedule (Tentative)

Before School (In Library)
M-Th 7-8am

After School (In Library)
M-F 3-4pm

Contact your counselor or Mr. Kirk to sign up!

Tutoring will begin at the end of August

Click here to print schedule

Aeries.net Parent Portal Accounts Now Available!


The Chaffey Joint Union High School District is pleased to announce the Aeries.net Parent Portal. This new tool allows parents the opportunity to electronically update student information and complete the summer mailer online. This process is optional and ready now! Here’s how to get started:

  1. Complete the letter received by mail or download a copy here and return to the LOHS guidance office.
  2. You will be contacted by LOHS with your unique code needed to open your Aeries.net Parent Portal account.
  3. Download instructions here on how to create your Aeries.net Parent Portal Account.
  4. When the Summer Data Confirmation Window opens in Aeries.net you will be able to update your student information online instead of completing most documents included with the summer mailer. Click here to view a brief video on completing your summer data using Aeries.net.

Click the link below to connect to Aeries.net:

Los Osos High School - A California Distinguished School

CA Distinguished School Logo

Dear Distinguished School Award Recipient,

Congratulations on successfully completing the 2013 California Distinguished School application process, and being recognized as one of our 218 California Middle and High Distinguished Schools! This award is a direct reflection of the dedication, hard work, and vision of your school’s educational community, and I am pleased to be able to award this honor to your school.

This year we will be recognizing the 2013 Distinguished Middle and High Schools along with the Exemplary Program Honors, the 2012 National Blue Ribbon Schools, and the 2013 Title I Academic Achievement Award Schools.

The news release identifying all the 2013 Distinguished Middle and High Schools is posted online at http://www.cde.ca.gov/ under What’s New.

Again, congratulations on receiving Distinguished School recognition. Please note that if you also applied for Exemplary Program honors, it will be announced very soon through a separate news release. If you have any questions regarding this subject, contact the Awards Team at 916-319-0842 or by e-mail at Awards@cde.ca.gov.


Tom Torlakson

Week at a Glance


Apply Online for Meal Benefits

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Try a new and convenient way to apply for Free and Reduced Meal Benefits online. It's fast, easy and confidential. 


Mrs. Petrocelli, Principal

Susan Petrocelli

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LOHS Summer Assignments

Los Osos News

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Order Your Official Transcript Online!

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The link above provides you with the ability to request transcripts through Secure Transcript. Transcripts requested online are sent securely to the colleges, universities, or scholarship funds that you select.

You may track your request online, and you will also receive an email notification when we approve your transcript request, and again when your transcript is mailed (or delivered electronically, based on the delivery preference of the destination that you select).
Download instructions here.

School Accountability Report Card

2012-2013 - English
2012-2013 - Spanish

A hard copy of our SARC Report is available in the main office.

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