And if you live in an area where evolution is a controversial topic, then you should leave it up to the parents. You don't have a right to use their money to teach something that a lot of people don't want to be taught. Of course, there's some line where something is fringe enough and you don't have to accommodate every last person. Again, try to be neutral, don't aim for perfection.
And you know what? Evolution is a nuanced topic. The actual claims that can be backed up by first principals using the scientific method are fairly narrow. Much of the reasoning is very prone to confirmation bias and all kinds of after-the-fact fitting rather than forward-looking predictions. To stick to the science on the topic of evolution you have to be pretty careful and most teachers are not. Not saying it shouldn't be taught... I think it has a lot of explanatory power outside of pure science and represents a large body of important observations. But I don't think it's a good example of science-vs-idiots.