While a Finder window is open or the desktop has been clicked, Click on "Go" across the top of the screen, then "Connect to Server..."

In the "Server Address" dialog, type "afp://NetID@courses.jlmc.iastate.edu" without the quotes, replacing "NetID" with your actual ISU NetID. Click "Connect."

Enter your user name and password when prompted. Click "Connect."

You should be presented with a screen similar to the image below. Select the appropriate folder according to your class.