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Los Osos High School
24 Hour Attendance Line

(909) 460-5860

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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

Register to Vote

Click the image above to register to vote.


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Season’s Greetings Grizzlies! It’s hard to believe that we have only fourteen school days remaining in our first semester and then we will be off on winter break (December 19-January 2). I would like to remind all Grizzlies to continue on with your studies so that you can have a strong first semester finish. Please use the next few weeks to prepare for your final exams. Final exams are expected to be the concluding activity for our courses and many of them are comprehensive, covering material from the entire semester, and weighing heavily into determining student grades. 
(Please see our FINAL EXAM schedule for first semester posted on this page.)

Parents, please continue to monitor your student’s progress and do not hesitate to contact your student’s teachers or counselors regarding their progress.

On behalf of the staff at Los Osos High School I would like to wish all of you a very safe and happy holiday season. Enjoy your break to the fullest so that you can return to school refreshed and ready to jump into the second half of the school year.


Susan Petrocelli

Week at a Glance


PTSA Honorary Service Award Nominations

Do you know someone within our school or community
who has volunteered their time and effort
for the benefit of our students?

Each year the LOHS PTSA honors an individual for going above and beyond the call of duty.
If you know someone deserving of this honor, please submit their name with a brief explanation of their efforts on the form below.

PTSA Honorary Service Award Nomination Form

Nomination Forms due by January 23, 2015

Tutoring Opportunites

LOHS Tutoring Opportunities

Before & After School (In Library)
Monday - Thursday

During Lunch (In Library)
Monday - Friday


No need to sign up, just go to the library for FREE TUTORING!!!

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:

Order Your Official Transcript Online!

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

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

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, Principal

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Important Senior Information

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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NCAA Eligibility