training frustrations

I had to show my apprentice today how to use the modulus operator, as he just didn't get it.

But before that I had to explain how to divide integers leaving a quotient and remainder. He didn't get that either.

"Ok, so tell me the remainder of one divided by two..."
(several seconds pause)
"That's a bit hard."

I ended up drawing diagrams and using coins to explain how to do division. Just what are they teaching them these days??

>>5
 
Fail at HASKELL
Prelude> let a (<=>) b = True
Prelude> 1 <=> 2

<interactive>:1:2: Not in scope: `<=>'