Perform whatever experiment is assigned by your teacher. On the right you see a PhET simulation.
  1. Click on "Intro"
  2. Choose items from the toolbox on the left.
  3. Set up the circuit required by your assignment.
  4. To remove a component, click on it then click on the trash can.
  5. To change the value of a resistance or battery, click on the component and use the slider.
  6. To break a connection, click on the connection and then click on the scissors which appear.
  7. You can save a screenshot to your downloads folder by clicking on the menu (3 vertical dots on the lower right) then on screenshot.