diff --git a/book/exercises/005a.md b/book/exercises/005a.md
index 9e49aa2..684e4b4 100644
--- a/book/exercises/005a.md
+++ b/book/exercises/005a.md
@@ -7,19 +7,19 @@ You can find the link to reuse in one of two ways:
 * Use the [TeachBooks Recombiner](https://teachbooks.io/recombiner/) to select and copy the link.
 * If the page isn't listed in the Recombiner, find the link manually in the GitHub repository.
 
-\::::::{topic} Exercise objective
+::::::{topic} Exercise objective
 Can you include a page from someone else’s book into your own using `external:` in your `_toc.yml`?
-\::::::
+::::::
 
 
-1. **Find the page you want to reuse:**
+1. Find the page you want to reuse:
 
-   * **Option 1:** Open the [TeachBooks Recombiner](https://teachbooks.io/recombiner/), select the book and chapter(s) you want to reuse, and click **Show how do it yourself instructions**. Copy the `external:` link provided.
-   * **Option 2:** If the page isn’t in the Recombiner, find it manually:
+   * Option 1: Open the [TeachBooks Recombiner](https://teachbooks.io/recombiner/), select the book and chapter(s) you want to reuse, and click *Show how do it yourself instructions*. Copy the `external:` link provided.
+   * Option 2: If the page isn’t in the Recombiner, find it manually:
 
      * Go to the repository (e.g., [TeachBooks Manual on GitHub](https://github.com/TeachBooks/manual)).
      * Browse the files and find the `.md` page you want (e.g., `README.md`, `workflows/collaboration.md`).
-     * Copy the **raw link** in this format:
+     * Copy the raw link in this format:
 
        ```yaml
        - external: https://github.com/TeachBooks/manual/blob/v1.1.1/book/examples/book_structure.md
@@ -29,7 +29,7 @@ Can you include a page from someone else’s book into your own using `external:
 
 3. Save the changes, commit, and push them.
 
-\::::::{admonition} Example: `_toc.yml` snippet
+````{admonition} Example: `_toc.yml` snippet
 
 ```yaml
 format: jb-book
@@ -41,7 +41,7 @@ chapters:
   - file: 003
 ```
 
-\::::::
+````
 
 4. When you are ready, commit your changes to the repository by clicking on the green `Commit changes` button.
 
@@ -53,12 +53,12 @@ chapters:
 
 
 
-\::::::{admonition} Check your understanding
-\:class: note
+```{admonition} Check your understanding
+:class: note
 
 Before moving on, make sure you understand:
 
 * What is the benefit of linking to an external page instead of copying it?
 * How does using the Recombiner simplify adding external content?
 * What can you do if a page isn’t in the Recombiner?
-  \::::::
+```