Following is a collection of online resources that may be useful for the course or are things I thought would be interesting to people looking a programming language semantics. You may also run across some things that are just plain silly as well.
The official syllabus for the course.
Home of all things Haskell related.
Winskel is (almost) right is a paper and accompanying Isabelle theories that explore the first 100 pages of Winskel's text. A paper and the Isabelle theories are included. Pretty interesting if you took EECS 755 when we used Isabelle.
Graham Hutton's wonderful paper on fold and unfold for defining program semantics
Notes on Graham Hutton's paper as well as executable code
Duponcheel's paper on writing modular interpreters
Notes on Duponcheel's paper including exectuable code
A comprehensive bibliography of Haskell papers