Public schools are by nature a conglomeration of private individuals that hold any and every view of life imaginable. The attempt to introduce disclaimers WRT to evolution is a reaction to overhanded declarations by evolutionsts, who present themselves and their theories as if they must receive uncritical acceptance. This is a disservice to private individuals who may hold some fairly reasonable theories of their own.
I am no friend of a public school that cannot tolerate open intellectual debate. Just as one can hold evolutionist views without adopting communism, so can one hold creationist views without becoming a Christian.
I think the American public is getting just a bit tired of force-fed evolution theory when their tax dollars are paying for it.