How far has humankind fallen to have gone from the ☛ manicule indicating active thought in manuscripts of the 12th century  to the all-too-frequent thumbs up in the 21st century indicating a passive action with almost no thought at all?
Read Creating a Commonplace Book (CPB) by Colleen E. KennedyColleen E. Kennedy
During the sixteenth and seventeenth centuries, one of the most important tools of a reader or writer was a commonplace book (CPB). Peter Beal, leading expert on English manuscript studies, defines a commonplace book as “a manuscript book in which quotations or passages from reading matter, precepts, proverbs and aphorisms, useful rhetorical figures or exemplary phrasing, words and ideas, or other notes and memoranda are entered for ready reference under general subject headings.” Your sources can include, first and foremost, the assigned readings and supplementary materials, as well as any other useful texts you come across. I encourage you to supplement CPB entries with extra-curricular material: quotations from readings for other classes, lyrics from songs, lines from movies, tweets with relevant hashtags, an occasional quotation from a classmate during discussion, etc. These extra-curricular commonplace passages, however, are in addition to and not in place of the required passages as described below.
I love this outline/syllabus for creating a commonplace book (as a potential replacement for a term paper).

I’d be curious to see those who are using as a social annotation tool in coursework utilize this outline (or similar ones) in combination with their annotation practices.

Curating one’s annotations and placing them into a commonplace book or zettelkasten would be a fantastic rhetorical exercise to extend the value of one’s notes and ideas.