I have never heard any evidence against evolution?
There is plenty of evidence against the theory of evolution (hence the large group of people who continue to disbelieve it, including many scientists). I read a book on it once which was very convincing. Unfortunately, I didn't retain many of the scientific details. It has to do with problems with the fossil record and out of place artifacts, and I don't remember what else.
Perhaps yov could elaborate on his comments on theory, which I don't really understand. I don't have a problem with evolution being taught as a scientific theory, I just object to it being taught as the undisputed truth.
Um, there is not plenty of evidence against the theory of evolution. If there was, then it would no longer be a theory. That's the nature of science. Perhaps you need to review Answers In Genesis's rebuttal of Kent Hovind in an article "Arguments Creationists Should Not Use."
Every scientific theory is treated the same way in every science class: this is the best explanation we have to date based on the available data. That includes evolution, gavity, electromagnetism, gas pressure, germ theory, relativism, etc.
A good science class on day one will teach the scientific method, which includes the scientific definition of theory. The scientific word that approxmiates the common usage of "theory" is "hypothesis."
Hypothesis: based on available data, I suspect that things operate this way.
Testing: compare hypothesis to data. Do research to acquire more data, be it looking through a telescope or mixing compounds in the lab or digging in the ground.
Result: I have found contradictory data and therefore my hypothesis must either be modified or discarded.
Result: I have found data that confirms my hypothesis, and it is now a theory.
No scientic theory, none of them, are ever proven. A "proven" theory means you have determined that there will never be contradictory data, and that means you have proven a negative. Since you can't prove a negative, you cannot prove a scientific theory.
Instead a scientific theory is "well supported." There is a great deal of evidence that supports the theory and a distinct lack (not small but nonexistant) of data that opposes the theory.
And there is that distinct lack of data that opposes evolution. Quantum physisists wish they had as much data in support of their theories as Evolution has.