On the handouts page you will now find two different links for each Jupyter notebook.

One links to the notebook itself -- the *.ipynb file. Right-click on these links to download the notebooks to your computer.

The other link is to a service called nbviewer which just renders the notebook as a regular web page. You may find this convenient for viewing the content without bothering to launch a notebook server. But note that these are static web pages without the interactive Python interpreter.