Intelligent design

As far as I understand Intelligent design and the premise that it is trying to use to get into schools is that evolution did happen but that in the beginning and along the way some guiding force helped everything end up the way it did. While this is not bad and I would agree that with all the complexities of nature it is hard to believe that a human could have thought all this up. What I do not understand is why people are even considering putting this in the schools. If the basic part of Intelligent design is that:

"Something smart" + Evolution = World today

Then why do they have a problem with teaching evolution in school and then when people are with their religious groups, whatever they may be, they can add that power on. Just a simple bolt on to what the person all ready believes from school. If Intelligent design is what it says it is then this would be easy. If on the other hand it is a blatant attempt to bring religion into schools, then I think they are doing nothing more then falsifying their claims to get religion into schools.