Due to covid I am looking for an online whiteboard (of course with free license) for quick notes using a (wacom) pen. I teach Math and have organized a low resources way using mumble. The students receive a handwritten scanned pdf document with the notes to be presented in the next lecture and are required to have them printed out before the lecture starts. However, these notes are NOT fully written. There are missing parts. We all connect in a mumble channel and I present the material in audio with the students following the presentation on the printed notes completing the missing parts as they hear it. This method forces students to really attend the lecture, instead of watching you through BBB or jitsi or zoom where they end up …sleeping!
However, I have one more problem to solve. If a student asks a question for which I need to write something in order to explain I need a way to write a few quick notes with a (wacom) pen. But how to share this with the students? I do not want to enter a jitsi session for a quick note. Is there another way?
For example, I could have gimp open, write there and save a jpg file on a web page and ask them to reload the page. But this is kind of slow. Does anyone know of something faster, more interactive?