For people who really like to take courses in the MOOC Coursera, I strongly recommend to use cousera-dl to download a group of lecture resources (.ppt, .pdf, .mp4). You can download all the available resources or make a filter by section name, lecture name, format, others, However, the installation could be a little hard work for people who are not accostumed to Terminal or console, but it really worths. I hope it results useful for you as it was for me.

“Coursera Downloader”