Northwood Elementary School students arrive for their first day of classes on Sept. 1. All Mercer Island School District schools with students in grades 1-12 began in-person, full-time classes on that day. Kindergartners were set to start in-person, full-time classes on Sept. 3. All students and employees will be required to wear masks in their buildings and on school buses.

Northwood Elementary School students descend the stairs en route to their classes. Andy Nystrom/ staff photos

A Northwood student skips with joy on the first day of classes. Andy Nystrom/ staff photo

A mother hugs her children before they head toward the Northwood school building. Andy Nystrom/ staff photo

A Northwood school administrator helps a student map out her schedule. Andy Nystrom/ staff photo