It is just my thought, but if MathsIsFun has some time, maybe he should consider adding a few more explanations to the pages? I think they are extremely good so far but they appear to me (a little bit) as a reference. For example, on http://www.mathsisfun.com/sets/function-transformations.html maybe write a few lines explaining why they work in such a way.
caveat: I am in no way saying I dislike the pages. I think they are the best set of resources on the internet regarding middle and high school maths. I just thought of this and decided to suggest it.
When MIF publishes a new page he invites comments and will add fresh ideas when they are offered. So why not be more specific by actually suggesting some additions yourself.
You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei
I certainly do welcome fresh ideas!
Feel free to suggest text or images that could be included.
"The physicists defer only to mathematicians, and the mathematicians defer only to God ..." - Leon M. Lederman