I would say one of the primary responsibilities of a science teacher is to interest his or her students in science and teach them the fundamentals of scientific inquiry, skepticism and research.
I know that sounds complicated, but it's the kind of thing that you should be teaching to even small children. Scientific inquiry, for example, can be taught to five year olds in a simple form, by, for example, performing experiments with growing seeds and getting them to think about what we learn from the experiments. You don't have to use big words or complicated concepts. Kids are perfectly capable of working out why an experiment needs to be conducted blind, or why we have to use a control in order to truly get usable results.