I found this a few days ago, it uses very clear and simple terminology, as well as some really good examples.
"In the real world, this would be a problem. But in mathematics, we can just define a place where this problem doesn't exist. So we'll go ahead and do that now..."
Letter, number, arts and science
of living kinds, both are the eyes.
He sure is good at explaining it. I have it open, and read bits of it when I can.
"The physicists defer only to mathematicians, and the mathematicians defer only to God ..." - Leon M. Lederman
Nice find, I'm sure a lot of people will use it. And yes, very good explaining...