diff --git a/src/teaching/cse-350/2024sp/index.erb b/src/teaching/cse-350/2024sp/index.erb
index fc549d15..d92556f6 100644
--- a/src/teaching/cse-350/2024sp/index.erb
+++ b/src/teaching/cse-350/2024sp/index.erb
@@ -41,6 +41,8 @@ schedule:
     detail: A review of the memory hierarchy, formalizing the external memory model, and an overview of techniques for managing data in external memory, including sorting as an example.
   - topic: B+ Trees
     detail: We build a B+ Tree from first principles and binary search
+    docs:
+      notes: slide/04-serialization.pdf
   - topic: Write-Optimized structures
     detail: We build up LSM trees and Beta-Epsilon Trees from first principles
   - topic: The Shuffle Operation