It shall be the duty of all teachers to endeavor to impress on the minds of their pupils the principles of morality, truth, justice, temperance, humanity and patriotism; to teach them to avoid idleness, profanity and falsehood; to instruct them in the principles of free government, and to train them up to the true comprehension of the rights, duty and dignity of American citizenship.
RCW 28A.405.030