To my students:
Taking notes by hand (i.e., with pen & paper) has been shown to correlate strongly with better learning.
Just to show you what notes can look like, here’s some of my notes from high school.
And just to prove that I wasn’t quite the nerd you might think I am, here’s a page from my dad’s notes from his university calculus course. My dad was an olympic-class swimmer in the butterfly stroke, a regional champion graeco-roman wrestler, and… well, was known for getting into trouble fairly often.
Read ’em and weep.