I bought the downloadable copy of The Essential Woodworker (only $12) on the basis of Andy Kev's review and find it excellent. My aim was to get something to provide a framework and reference work for some tuition classes that I am just starting for my (adult) son and his partner, who are used to absorbing information efficiently from online and print sources. I had already planned to start with the basics of planing, marking out, sawing and basic joints, and TEW sets this out in an admirably clear and structured way, with excellent diagrams. While they will get one-on-one instruction, they have to be able to work on their own too, and having a quick reference to check that they have not omitted a step, or exactly how an operation is done, will be so valuable.
As others have mentioned, the consistency of approach is invaluable.
I do find some YouTube instructional videos worthwhile, because sometimes it is easier to learn from seeing a good example than reading even an illustrated description. The trick is to use something like TEW to filter out the extensive rubbish and discover what is worth viewing! I find I can't watch most woodworking videos without losing patience, because of the egotism, bragging, rambling, showing trivial stages, etc, but occasionally there are gems.
Of course I also found, as so often when you are preparing to teach something, that I clarified my own knowledge and understanding and learned some new techniques!
Keith