Lifehacker
shared a link post in group #Lifehacker
lifehacker.com
Use the ‘Feynman Method’ to Tell If You’re Ready for a Test
Confirm your mastery of a subject by becoming a teacher (sort of).
Comment here to discuss with all recipients or tap a user's profile image to discuss privately.
Embed post to a webpage :
<div data-postid="nveoymz" [...] </div>