A Place to Jot Down What You’ve Learned

Whether it’s from a lecture, a book, or a video, share whatever you’d like to hold onto. If you mention where you came across it, others can go find it too. Please don’t copy long passages word for word — copying someone else’s writing wholesale isn’t fair to the person who wrote it, and it can raise copyright issues. About three lines in your own words tends to be the easiest to read. And it’s fine if you later realize you got something wrong — just fix it in the comments, and that becomes part of the record too.