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The article is likely aimed at intermediate-ish FP programmers, though, not people with no prior knowledge. (Although I suspect it is an example of "learning by teaching", since it is wrong on many counts.)

Learn You a Haskell mentions functors in chapter 8 and teaches them properly in chapter 11.

http://learnyouahaskell.com/making-our-own-types-and-typecla...

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In my opinion Monads at this point should be considered a beginner Haskell concept.

Regardless of how LYAH chooses to order things, (when have you used a Zipper last time?), they are too essential to any beginner Haskell program.

In my opinion we need a new imperative first approach to Haskell teaching, to develop intuition on monads quickly.

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