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+++ b/index.mdwn
@@ -165,6 +165,20 @@ Practical advice for working with OCaml and/or Haskell (will be posted someday);
 (**Week 8**) Thursday March 26
 > Topics: [[Safe division with monads|topics/week8_safe_division_with_monads]]
 
+(**Week 9**) Thursday April 2
+> Topics: Programming with mutable state; the State monad; using multiple monads together
+
+> Here are some OCaml libraries: [[Juli8|code/juli8.ml]] and [[Monad|code/monad.ml]]. We'll write up explanations of these soon. But quickly, before you `#use "juli8.ml"`, you have to run this in your OCaml session. (I have these lines in my `~/.ocamlinit` file, so they run every time OCaml starts up:
+
+>     #load "str.cma";;
+>     module Std = struct
+>       include Pervasives
+>       module List = List
+>       module Random = Random
+>       module String = String
+>     end
+
+
 <!--
 We've added a [[Monad Library]] for OCaml.
 We've posted a [[State Monad Tutorial]].