Missing/sick students: If you believe any of your students are “missing” (i.e., not responding to any of your prompts), please notify Art King. If a student informs you that they have been diagnosed with COVID-19, please notify Andrea Caviness.
A relatively low-tech way to do online teaching is to record a podcast that you then share with students through Blackboard. Audacity is a free and easy-to-use, multi-track audio editor and recorder for Windows and Mac OS X. Here's a quick tutorial.