Update README.md

Author: keller-mark

README.md

@@ -10,6 +10,12 @@ An overview of the content can be found at [notebooks/Index.ipynb](notebooks/Ind
 
 If you have a Google/Gmail account, you can Run this tutorial from your browser using Colab: [![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/vitessce/vitessce-python-tutorial-2026/blob/main/notebooks/Index.ipynb).
 
+## Additional materials
+
+Prior tutorial materials can be found in https://github.com/vitessce/vitessce-python-tutorial-2023.
+
+
 ## Acknowledgements
 
-The format and structure of these tutorial materials are inspired heavily by the [Gosling Tutorial](https://github.com/gosling-lang/gosling-tutorial) created by Sehi L'Yi, Trevor Manz, Qianwen Wang, and Nils Gehlenborg.
+The format and structure of these tutorial materials are inspired heavily by the [Gosling Tutorial](https://github.com/gosling-lang/gosling-tutorial) created by Sehi L'Yi, Trevor Manz, Qianwen Wang, and Nils Gehlenborg.
+