Some of my friends have asked me, quite honestly and bluntly, why do we teach algebra in school? “I’ve never used algebra. or other highfalutin subjects and create low graduation statistics? It would really be nice not to struggle in life. A few years ago, I wrote a post Don’t teach built-in plotting to beginners (teach ggplot2). I argued that ggplot2 was not an advanced approach meant for experts, but…