The problem is not the content of any text. Btw, yours is good, but actually not for me, not because you are any bad, but because my brain is this way.
Knowledge don't magically jump into the brain of people.
The most important part about knowledge is not its raw packed informative formalism but the teaching, or letting enough leisure time for people to study by themselves. It is the art of letting people build their own intuitive understanding. No computer, no books, no things can replace a good teacher, or a a good book that suits you.
That is why we need to disagree ;) dialog, and then agree again. Because, maybe dialog is a way of learning.
You make it sound like these are obvious thing, but most people have trouble even with basic math, let a long linear algebra.
I wrote a short 4-page tutorial on linear algebra myself and it covers quite a few things. Would love to hear what you think about it: http://minireference.com/blog/linear-algebra-tutorial/