diff --git a/_toc.yml b/_toc.yml
index 640cea5..4c56bd8 100755
--- a/_toc.yml
+++ b/_toc.yml
@@ -54,8 +54,8 @@ parts:
       title: Class 5A
     - file: notes/week05/class5B
       title: Class 5B
-#     - file: notes/week05/class5C
-#       title: Class 5C
+    - file: notes/week05/class5C
+      title: Class 5C
 # - caption: Week 6
 #   maxdepth: 1
 #   chapters:
diff --git a/files/2024_S2_Class5C.pdf b/files/2024_S2_Class5C.pdf
new file mode 100644
index 0000000..1d758b8
Binary files /dev/null and b/files/2024_S2_Class5C.pdf differ