The student has become the teacher

You’ve read through chapter 5 of ggplot2: Elegant Graphics for Data Analysis. (If this statement is FALSE, make it TRUE.) It dawns on you that you’ve now read half of the chapters in the book and you could teach someone a thing or two.

So many layers…

Describe (in your own words) the different purposes of layers in a ggplot.

So much data…

Woe is me, I have too much data and my plots are overwhelming to look at! Give me 7 tips (in your own words) for dealing with my problem.