diff --git a/_episodes/01-tooling.md b/_episodes/01-tooling.md
index 0f63add227e340b0f77061b7f796241dd56994f4..58b8eb79860af3f8a0dad52a907d1d27c6b33648 100644
--- a/_episodes/01-tooling.md
+++ b/_episodes/01-tooling.md
@@ -15,35 +15,45 @@ keypoints:
- "Each page's configuration is stored at the top of that page."
- "Groups of files are stored in collection directories whose names begin with an underscore."
---
-This episode describes tools we use to manage lessons,
-which simplify many tasks but make other things more complicated.
+This episode describes the tools we use to build and manage lessons.
+These simplify many tasks, but make other things more complicated.
## Repositories on GitHub
-All of our lessons are stored in Git repositories on GitHub.
-Git uses the term *clone* to mean "a copy of a repository",
-while GitHub uses the term *fork* to mean "a copy of a GitHub-hosted repo that is also hosted on GitHub"
+Our lessons are stored in Git repositories (or "repos") on GitHub.
+We use the term *fork* to mean "a copy of a GitHub-hosted repo that is also hosted on GitHub"
and the term *clone* to mean "a copy of a GitHub-hosted repo that's located on someone else's machine".
In both cases,
the duplicate has a reference that points to the original repo.
-A user on GitHub can only have one fork of a particular repo.
-This is a problem for us because an author may be involved in writing several lessons,
-each of which has its own website repo.
-Those website repositories ought to be forks of the [template repository]({{ site.template_repo }}),
-but since GitHub doesn't allow that,
-we use [GitHub Importer][github-importer] when creating new lessons.
+In an ideal world,
+we would put all of the common files used by our lessons
+(such as the CSS style files and the image files with project logos)
+in a template repo.
+The master copy of each lesson would be a fork of that repo,
+and each author's working copy would be a fork of that master:
+
+
+
+However, GitHub only allows a user to have one fork of any particular repo.
+This creates a problem for us because an author may be involved in writing several lessons,
+each with its own repo.
+We therefore use [GitHub Importer][github-importer] to create new lessons.
After the lesson has been created,
we manually add the [template repository]({{ site.template_repo }}) as a remote called `template`
to update the lesson when the template changes.
+
+
## GitHub Pages
If a repository has a branch called `gh-pages` (short for "GitHub Pages"),
GitHub publishes its content to create a website for the repository.
Websites can be static HTML pages,
which are published as-is,
-or can use [Jekyll][jekyll] as described below.
+or can use [Jekyll][jekyll] as described below
+to compile HTML and/or Markdown pages with embedded directives
+to create the pages for display.
If the repository's URL is `https://github.com/USERNAME/REPOSITORY`,
the website is `https://USERNAME.github.io/REPOSITORY`.
diff --git a/fig/forking.odg b/fig/forking.odg
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+
+
+
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+
+
+
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