Download the lecture notes and video lectures from MIT Open Cource Ware Website.
TBH, you could do that with the following wget command in 'nix 1 -
wget -A pdf,jpg -m -p -E -k -K -np http://site/path/
I was getting bored.
python ./scr/main.py <ocw link of notes or videos page> <file extention>
This will create a folder on the
root
directory with current timestamp and you can move to the desired location and rename it as you like.