It’s back to class for in-person learning at Sweetwater Union High School District campuses All students must wear masks inside classrooms. Teachers also have to wear masks but said it’s a small price to pay for no more teaching through a computer screen. Author: Steve Price (Reporter) Updated: 7:04 PM PDT July 21, 2021 CHULA VISTA, Calif. — Summer vacation is officially over for thousands of students in the Sweetwater Union High School District. They headed back to class Wednesday for in-person learning. But there was a pandemic twist – all students must wear masks inside classrooms. Teachers also have to wear masks, but they said it’s a small price to pay for no more teaching through a computer screen.