What makes a good science teacher

It's taken me a while to take a swing at this particular Ask A ScienceBlogger question, mostly because I just don't know the answer.

It's definitely true that some science teachers are better than others. The best teacher I had in high school was my physics teacher. The worst teacher I've ever had was for biochem. Thinking about it, I can figure out what made the bad teacher bad, but I'm having a much harder time figuring out what makes a good teacher good. If I had to guess, I'd say that the traits tha make a good science teacher are probably the same traits that make a good teacher in any subject. I think it comes down to enthusiasm for teaching, and the ability to deal with every student as an individual.

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What makes a good science teacher? That is the new ask-a-scienceblogger question. I am sure that there has been a lot of research into this, none of which I have read. That is why this post is categorized as an "armchair musing."