Sunset PTSO Sunset PTSO An organization dedicated to enhancing the experience for our students teachers and community at Sunset Primary. Sunset Primary Parent Teacher Student Organization PTSO is a federally recognized 501c 3 nonprofit organization. Membership in the PTSO includes every parent teacher and student of Sunset Primary School with no annual dues or obligation. It is our MISSION to organize events that are fun which create a culture of community and provide sociable entertainment for children and parents alike and at the same time continue to raise much needed funds for the benefit of all the children at the school now and in the future.