diff --git a/book/_toc.yml b/book/_toc.yml
index d2b54e1..cde2b7a 100644
--- a/book/_toc.yml
+++ b/book/_toc.yml
@@ -94,7 +94,7 @@ parts:
       - url: https://classroom.github.com/a/uYXRb0cZ
         title: "Practice: Tilted P-in-Box"
       - url: https://classroom.github.com/a/L_iBB1Pp
-        title: "Practice: Gaussian Wall"
+        title: "Practice: Gaussian Well(s)"
 
 
     - file: ManyElSystems.ipynb