diff --git a/src/11_nearly_free_electron_model.md b/src/11_nearly_free_electron_model.md
index 9222e05bb60578c387bee9c1fae7d1d349e747f4..8479f706aaa1a2ef5d0938157c3b29b4701b523c 100644
--- a/src/11_nearly_free_electron_model.md
+++ b/src/11_nearly_free_electron_model.md
@@ -6,8 +6,8 @@ import plotly.graph_objs as go
 pi = np.pi
 ```
 
-# Tight binding and nearly free electrons
-_(based on chapters 15–16 of the book)_  
+# The nearly free electron model & Bloch theorem
+_(based on chapter 15 of the book)_  
 
 !!! success "Expected prior knowledge"