And the d% confusion gets me more than anything. To give the players more feel of influence in the game, I call for High/Low rolls quite often. They roll a d% and call high or low.
I'm in constant communication with my members and I'm always asking if there are things I can do better to improve their experience or ways I can help them learn the mechanics.
I don't remember it being this drawn out of an issue when I first started (oh so many years ago), but she's not the only one that will space out on what a d20 looks like, or what a percentile means