Refine text

Author: danielballan

README.md

@@ -1,16 +1,20 @@
 # Executable Tutorials
 
+## Use Cases
+
 Many organizations maintain collections of tutorials addressing realistic
 problems in a science domain, with runnable code examples written and
-kept current by experts in the tools.
+kept current by experts in the tools. They are useful as:
 
 - A trove of working snippets to copy and paste
 - A maintained resource for self-guided learning
 - A ready-to-use curriculum for interactive workshops
 - A suite of science domain-specific "integration tests"
 
-This repository demonstrates one way to configure a collection. It emphasizes the
-following features:
+## Key Features
+
+This repository demonstrates one way to configure a collection of tutorials,
+covering some core features:
 
 - Source is in [MyST Markdown][] which is easy for humans to edit and review.
 - The executed examples---code and results---are published as a static site.
@@ -19,6 +23,7 @@ following features:
   - In a user's local environment
   - On a Binder ([example][binder example])
   - (Experimental) In the user's browser via Jupyter Lite ([example][jupyterlite example])
+- The examples can be tested using `pytest`, both locally and on CI.
 
 The repository also includes a [Guide to Contributing][] tutorials. This
 provides for a good overview of what this is like to use.