With your work in Technology, I recommend you take a look at Wiziq's virtual classroom and authorstream's power point presentation platform. Both are web based platforms, have a bunch of features and free basic service. Here’s a public class recording you might find of interest.
Hello Therese, I hope your judging experience is going well. I've been a judge for quite a few events so if you have any questions or conerns, please feel free to ask. As the meta-judge, I'm consolidating our group's inputs. Therefore, if you could send your scores to firstname.lastname@example.org, I will include your scores in the overall grading. I will also send you the final results when I'm done. Thanks again and I hope to hear from you soon.