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diff --git a/index.mdwn b/index.mdwn
index 6a3c3f23..a122c1da 100644
--- a/index.mdwn
+++ b/index.mdwn
@@ -121,8 +121,10 @@ Reduction Strategies and Normal Forms (in progress);
 (**Week 4**) Thursday 19 February 2015
 
 > Topics: [[!img images/tabletop_roleplaying.png size="240x240" alt="Hey, no recursing"]]
-Yes, recursing (in progress);
-Towards types (in progress)
+[[Yes, recursing|topics/week4_fixed_point_combinators]];
+[[More about fixed point combinators|topics/week4_more_about_fixed_point_combinators]];
+Towards types (in progress);
+[[Homework|exercises/assignment4]]
 
 > Now you can read Sections 3.1 and 6.1 of Hankin; and browse the rest of Hankin Chapter 6, which should look somewhat familiar.