Below is a video demonstrating the use of the Oxidation Numbers Tutor. To play the demonstration, click on the "play" button - - of the video controls.
If at any time during your use of the tutor you would like to see the video demo again, "Tutor Demo" item on the left.
Now that you are familiar with how to use both the Assessor and the Tutor, please click the "Launch Assessor" button below to begin.