Haskell is great for teaching kids logic, math, data structures - you just can't skip details the way you can with experienced programmers. This isn't that much different from teaching adults who aren't experienced programmers.
Most people on this list (me included) are probably people enjoying math and logic. But I know a lot of people who love CS and even do it professionally who think of math as a bit of a chore. Most of those take one look at Haskell and say "I'm not interested". With Python or Javascript/HTML you will be able to motivate a much bigger part of your audience. HTML was one of the first things I learned in CS. Also just wanted to add an example of how Haskell can be really tricky for very simple things. Let's consider the simplest loop I can think of. The function to sum up all the numbers up to N. Anyone new to Haskell will implement this in the straight forward way. sumToN 0 = 0 sumToN n = sumToN (n-1) + n It's very elegant. It's more of a definition than an algorithm, really. The equivalent python code would probably do a loop (4-5 lines). Now, if you run your python code for a billion, it will eventually return the correct result because you specified the algorithm more clearly. If you run the Haskell function for a billion however, it will crash your computer and set your house on fire. Now, you will have to explain tail recursion and why you won't get a StackOverflow despite the fact that you build up a huge stack. I have done Haskell for a quite a while, and I'm still unsure sometimes if something will work in constant space or not. Cheers, Silvio