I don't think that creation would survive 20 years in the event that it might "win" the argument and get let into schools. Setting aside the fact that in order to do that they would have to get one of the most significant amendments of the Constitution overturned, creationism and ID are so superficial as to be laughable with respect to their educational depth.
First of all, they could not make any inroads into college biology, geology, or astronomy. You might get a little bit of ID but where reality is concerned, it is poison to pseudo-science.
Worse case, what you really get is an elimination of science from K-12. I mean, how long does it take to say "godditit"? Rather than 2-3 years in high school dedicated to each of the main science fields you would just have 1 very superficial general "science" class that give basic neutral facts and then the creo or ID evangelizing. What text book are they going to use. Pandas is CLEARLY inadequate yet the only evidence we have of creationists trying to introduce an actual curriculium. If that is the best they have, then it is pretty much sad.
After that, market forces take over. As less and less US students are graduating with advanced science degrees the money will go elsewhere where they are not retarded enough to let religion into the science classroom. Either the US at that point would reject the dogma or fall into scientific obscurity.
Real conservatives would not let it get that bad and real liberals would be fighting it the entire time. As soon as it starts obviously affecting the bottom line, you will get people in the middle, the ones who maybe lean towards ID or creo but are not dogmatic about it, to get serious about kicking the priests and charlatans out of the education system.
Of course, biblical creationists are committed to belief in God's written Word, the Bible, which forbids bearing false witness; --AIG (lest they forget)