What is a good website to provide free online autocad lessons and tutorials?

There is nothing such as the best website to learn AutoCAD. nevertheless Autodesk has put together a simple step by step tutorial to help absolute beginners learn AutoCAD. Check Autodesk site.Apart from that, you can find some Basic AutoCAD tutorials on the internet, and remember google is your best friend.

http://www.mycadsite.com/tutorials/

youtube is good for free tutorial of autocad

www.lynda.com, knowledge.autodesk.com, www.cad-notes.com

http://www.autodesk.com/ is the best site 

https://knowledge.autodesk.com/support

www.lynda.com for beginners and/or advanced users 

https://www.youtube.com/user/learnautocad/videos

http://www.cadlearning.com/

http://www.mycadsite.com/tutorials/

Autodeske Dashboard, mycadsite.com

Defintely Youtube if you are looking for free tutorials. Also you have Lynda if your account guarantee a free access.