When we are #learning a subject over years there are stages you cross after which if you look back you would be like "wow! I can't believe this used to be so difficult one year ago". Just saw this talk about that in mathematics and teaching mathematics. I have felt it in every subject.
Part 1: https://youtu.be/zHU1xH6Ogs4
Part 2: https://youtu.be/4HFyWC-YtIk
Part 1: https://youtu.be/zHU1xH6Ogs4
Part 2: https://youtu.be/4HFyWC-YtIk
YouTube
On Mathematical Maturity (1) Thomas Garrity
Mathematical maturity is a key concept for the professional life of a mathematician. The term "mathematical maturity" is often used by college and university mathematicians. As I have discovered in the last few weeks at PCMI, it is not a common term among…