Below is a list of online resources that may be of interest to you.
- Haskell Cheat Sheet
- Good Haskell Style
- A Gentle Introduction to Haskell - an older and shorter tutorial, but still worth reading
- Learn You a Haskell for Great Good! – a nice free introduction to Haskell
- The Haskell School of Expression - slightly older but still relevant introduction to functional programming
Here are other useful resources for the class: