I used to think I knew how learning happens, and now I understand, although in a simple way, that learning is a complex process but essentially comes down to a change in long term memory. Mind blowing and yet makes perfect sense!
I used to think reading fluency was just about speed and how many words a student could read in a min. Now I know it is a measure to support both word reading and making meaning of the text because it helps reduce cognitive load of reading to support comprehension of the text