On the lesson you would like to edit, select “Add Slide”, then select “Add Content”. You will see an array of different content you can include in your lessons. Select “PhET Simulation”.
Once you select the PhET option, you will see the available simulations in a new box that appears
You can then select the category on the left and then choose your individual activity. If you click the simulation, the preview and done options will both become selectable
*Please note that currently not all PhET Simulations are available on Nearpod but you can use any that appear in the various categories offered as shown above.