The methodology of science is one of the most powerful tools we humans have ever devised.
The use of critical thinking and a rational approach to problem-solving, plus the actual procedure of asking a question, performing experiments, allowing peers to critique the approach used (lather, rinse, repeat) is amazingly effective. Application of science has saved untold millions of lives, led to awesome breakthroughs in technology, and helped us to reach out into space.
Children need to be introduced to this rational approach to solving problems as soon as possible. Weighing evidence and following the evidence where it leads are important in myriad large and small ways.
Unfortunately, there are continuing attempts to introduce magical thinking into public school science classes as if it is actual science--I'm referring to creationism/intelligent design, or whatever nomenclature those people are currently using.
Teaching creationism in a private religious school is not the issue. Teaching creationism in Federally-funded public schools IS a problem. It is a violation of the Establishment Clause of the U.S. Constitution, because the government would be tacitly favoring/supporting one particular religion over any others.
This ongoing situation can only be fought effectively in the courts. Check out the PBS documentary "Judgement Day: Intelligent Design on Trial" for a look at what is at stake.
That's where the National Center for Science Education comes in. The NCSE engages in legal battles (and there are a lot of them) to keep religious instruction from being taught in public schools. The NCSE also sponsors outreach and teacher programs. They focus on supporting biological evolution, and climate change issues.
Full disclosure: I support the NCSE through donating my time in the form of graphic design and illustration for their publications. I think they are awesome.
Please check out their work via their website: ncse.com, and consider pledging support for their important and crucial work.
We HAVE to keep science in science classes.