Yes, the teacher was arsey and that was unnecessary.
Children should be able to choose their own books- the classroom set up should enable this.
Sometimes children WANT to re read books. This is good. Parents however sometimes fail to see this. No one has intimated that DrN falls into this category.
Teachers do, occasionally , even the most patient, get a little worn by the amount of input that parents expect to have. Again, no intimation that the OP falls into this category.
Every single teacher I have met works with children becasue they genuinely enjoy it and WANT them to succeed. We are all fallible human beings who make mistakes and have moments when we instantly feel that we could have handled a situation better.
Scroll through the education threads and find the ones which rave about the teachers... if they aren't buried under the enormous volume of those complaining about teachers in some way. That imbalance mirrors real life; parents are very quick to complain, but far slower to take the time to say the positive things.
So, perhaps the teacher was a little quick, but perhaps all it needed was a little word with ds to point out that 1 familiar book and 1 new book would be a better combination.
As for those who have such strong views about how simple it all is.. feel free to walk the walk and try it yourself