Imagine adhering to a philosophy that attributes all organized matter and laws to "natural," i.e. "unguided" or "unpurposeful" events, and then trying to have such a point of view established by law as the only one permissible in public schools, all in a country whose Constitution strictly prohibits the establishment of a particular religious belief system. It's one thing to think organized matter can be explained by waving the hand and saying it isn't really organized. It is quite another to use force of law to make such a point of view the only one acceptable in a scientific setting.
Be that as it may, public schools are inherently secular. As such, atheistic philosophy and its implications should be just as welcome as any other religious belief and its implications. Both can be reconciled in a generic form without becoming impractical. As it stands, however, dogmatic adherents of atheistic science are apparently not about to yield to any suggestion that their belief system be challenged in the public forum.