Answer: Yes. RCW
28A.230.140 United States flag -- Procurement, display, exercises
-- National anthem. The board of directors of every school district shall
cause a United States flag being in good condition to be displayed during
school hours upon or near every public school plant, except during inclement
weather.
They shall cause appropriate flag exercises to be held in each
classroom at the beginning of the school day, and in every school at the
opening of all school assemblies, at which exercises those pupils so desiring
shall recite the following salute to the flag: "I pledge allegiance
to the flag of the United States of America and to the republic for which
it stands, one nation under God, indivisible, with liberty and justice
for all".
Students not reciting the pledge shall maintain a respectful
silence. The salute to the flag or the national anthem shall be rendered
immediately preceding interschool events when feasible.