Do students at Rio Calaveras school have to wear uniforms?

Yes.

The Stockton Unified School District's uniform policy is as follows:

Grades K-6:

Skirts, slacks, or jumpers: navy blue or khaki tan

Collared blouse or shirt: white or forest green

Sweater: navy blue or forest green

Grades 7-8:

Skirts, slacks or jumpers: navy blue, khaki tan, or black

Collared blouses or shirts: white or forest green

Sweater: navy blue or forest green