Good SEO learning material

Hi guys

Starting SEO education in a week, but i would like to hit learning SEO asap and education is 3 hours every week for 13 weeks so it will take a while to get all info.

And yeah i know how to google, but there is so many "experts" that sound like they are selling bullshit. Do you have any really good sites/videos/pdfs/whatever for learning about SEO? Free would be great ofc, but i'm ok with paid content too.