What imagined right has the school board trampled on by the mere use of a sticker? You must be a worshipper of the clean book god. And you are right, the school board is elected just as is Congress. By your definition we have no say in anything passed by Congress. That would be ludicrous. My point is pretty clear, the study of biology is not a right that has to be provided by schools.
And your minority argument is extremely weak, as any person could claim that teaching evolution tramples on their religious freedom, since you have defined a mere sticker as evidence of religion, they, likewise, could claim unwitnessed transitions from beast to beast are religious dogma.
The right not to have religious beliefs presented as facts to my kids in a tax-funded school.