Once teachers have completed all the tasks, they are automatically presented with a certificate of achievement which can be printed off or downloaded as a PDF for their records/bragging rights.
If you'd like to provide this Google Sheet to your colleagues, click on one of the following links. I only ask that you leave the attribution columns as well as the certificate intact (thanks!).
As always, I'd love to hear your feedback. Leave a comment below, find me on Twitter, or message me on Google+!