Video Reviewers via Crash Course
If you've read 'The Fault in Our Stars' you would probably know John Green (who is a great author). And in case you haven't heard, he is actually a vlogger (video+blogger), together with his brother Hank Green, in youtube under the name 'VlogBrothers'. They actually own another channel called 'Crash Course', which offers 'lectures' on specific topics.
(Credits to my friend Julia, who posted one video by them on our group page.)
So 'sophie' friends, here are some videos I found that you could use to review for the quarter exams! :)