James West posted this on facebook (well the image). I kindly asked him to post a blog with it so I could cross post:
The reason for this was, because I think this is awesome! and a perfect way to explain it. Especially for people who have only ever played with ascending.
A little while ago I was playing with my 5e group, and one dude named Scott (whose been playing for a long time) said "I hit AC 14". When he said that I realized that this guy had played old school games. We hit it off right away lol!
Anyways, if you need some help explaining it to a newb, or someone whose only ever played the newer way, print this off.
I'm going to print it and stick it in my hand out sheets to my players.