We’ve had our DC at a Montessori school for the past month. As far as the approach, I know they don’t do traditional ABC’s. They sound out the letters. When I really thought about that I don’t understand why everyone doesn’t teach that way.
Also, she’s become much more self-reliant. Not that she would ask us for everything, but she can move from one activity (puzzle to play kitchen) and clean up along the way.