diff --git a/content/00_index.ipynb b/content/00_index.ipynb
index 75eb0fd..1e7848f 100644
--- a/content/00_index.ipynb
+++ b/content/00_index.ipynb
@@ -27,14 +27,16 @@
     "If we have more time:\n",
     " - [Debugging in Python](./13_debugging.ipynb)\n",
     " - [Command line tools in Python Standard library](./14_python_builtin_cli.ipynb)\n",
-    " - [Python Toolkit for Production](./15_python_toolkit.ipynb)"
+    " - [Python Toolkit for Production](./15_python_toolkit.ipynb)\n",
+    " - [JupyterLite](https://github.com/jupyterlite)\n",
+    " - [GitHub Pages](http://pages.github.com)"
    ]
   },
   {
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "Use [pythontutor](https://pythontutor.com/python-debugger.html#mode=edit) or [Thonny](https://github.com/thonny/thonny) for visualization purpose"
+    "Use [pythontutor](https://pythontutor.com/python-debugger.html#mode=edit) or [Thonny](https://github.com/thonny/thonny) to visualize Python code to aid understanding."
    ]
   }
  ],