Mark Your Calendars!
Mark your calendar for our first general meeting of the year! Tuesday, September 28th @ 7:00 p.m.   Tours of the school will be available following the meeting.  Meet us in the Mount Si High School Library or join us virtually (link to be posted here prior to event). ... read full article

Picture Retake Volunteers Needed
We could use a couple of volunteers to help check-in and direct students needing photo retakes on Monday, Sept. 27, from 9 am-1 pm. Sign up at   Please note that per the statewide directive issued on Aug. 20, volunteers must show proof of vaccination or a negative COVID test within 72 hours prior to the visit. Masks must also be worn in the building at all times while volunteering. ... read full article

Join the MSHS PTSA
The last 18 months have been a crazy time for everyone -- parents, students, and teachers alike, but through it all the Mount Si High School PTSA has been working tirelessly to support the MSHS staff and students.  Joining the PTSA is the quickest and easiest way to help us make a difference in every student's high school experience. For as little as $10 your annual membership can support such programs as student welfare, staff appreciation events, and student recognition. This is one simple way to show your children that you value their high school experience and are working to make these years the ... read full article

SAT & ACT Prep Classes
Is your child planning on taking the SAT or ACT? SAT Prep is offering online classes designed to raise test scores and give kids the confidence to do their best! Choose from fall, winter, or spring sessions for the SAT or fall or winter for the ACT. Classes are limited to 25-30 students per session, so early registration is encouraged. SAT Prep will donate $20 to the MSHS PTSA for each MSHS student who registers for any course.  ... read full article

Welcome To The 2021-2022 School Year!

We would like to welcome our returning and new MSHS families to the 2021-2022 school year AND provide you with information on how you can get involved this school year!   Please take a look at how to "Connect and Get Involved" below and learn more about what we do, how we support the students, staff and parents, AND volunteer opportunities.

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Join or renew your annual PTSA membership.  There are many benefits of being a member, CLICK HERE to find out!

The information you provide to us here will enable us to communicate to you in a timely and accurate manner during the school year.  


Make a donation anytime during the school year.




Volunteer for PTSA programs and events.




Like Us On Facebook.  Information on PTSA programs and events are posted here on our website AND on Facebook.  



Need Support?  Information for parents on important topics to talk to kids about such as drugs, mental health, stress, etc.. are posted here. 


Sep 19
Oct 1
7:00p PTSA General Membership Meeting
PTSA General Membership Meeting

Tuesday, September 28
7:00p - 8:00p
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