diff --git a/book/exercises/007.md b/book/exercises/007.md
index d505f62..fb2f46e 100644
--- a/book/exercises/007.md
+++ b/book/exercises/007.md
@@ -1,4 +1,4 @@
-# Exercise 8: Add extensions to your book
+# Add extensions to your book
 
 TeachBooks supports many useful extensions, but sometimes you may want more functionality. In this exercise, you'll learn how to add an external extension to your book that is not already built-in. We will use the [`Sphinx-Indexed-Definitions`](https://github.com/TeachBooks/Sphinx-Indexed-Definitions) extension as an example, which allows you to define glossary-style entries with indexed labels in an easy way.
 
diff --git a/book/extension_exercises/014.md b/book/extension_exercises/014.md
index 0a6fdee..3e716d2 100644
--- a/book/extension_exercises/014.md
+++ b/book/extension_exercises/014.md
@@ -58,7 +58,7 @@ kernelspec:
 ---
 ```
 
-2. Now you can insert executable code cells with tags like this:
+2. Now you can insert executable code cells like this:
 
 ````md
 ```{code-cell} ipython3