diff --git a/notes-and-examples/2026.08.27/topological_sort.md b/notes-and-examples/2026.08.27/topological_sort.md
index be6ca62..ec81a73 100644
--- a/notes-and-examples/2026.08.27/topological_sort.md
+++ b/notes-and-examples/2026.08.27/topological_sort.md
@@ -24,6 +24,8 @@ is in the order which you need to take them, what would that look like?
 This order is what we're trying to achieve with the topological sort
 algorithm. Note that there can be multiple correct solutions.
 
+By the way, [here is a link to the whiteboard](https://excalidraw.com/#json=69478-DnuxlMCcyaOkazP,I_-nOWaO9m0wJkAFfqt9JA).
+
 ## The exercise
 
 Let's write the algorithm. First, test it against the Chapman classes, then