It taught me principles evaluative thinking, which includes the idea of "well, how do you define what constitutes a God?". My current conclusion, subject to future or reevaluated evidence otherwise, is if there were/is a creator being, it's of no consequence, so it's irrelevant. It isn't a 'yes or no' question. Strictly speaking then, science didn't teach me there is no God. But I concluded inasmuch.

Yes, teaches logical thought.

Yes! The art of questioning is what led me to realize that religion is mythology.

Yes..in high school biology..

Yes. Sort of. Although once into my late teens I developed good critical thinking owing to reading certain books. I also had a rebellious attitude in that I didn't like to be told how to , well I suppose , think.