The Verdict
Software whiteboards
W hen starting using whiteboard software, you’ll probably begin by using it for taking notes. This means you’ll find even the simplest choice here adequate. Once you want to start annotating documents, you run into limitations using the simplest of tools. Not all support importing PDFs, which you’ll need when going through reports. Mind you, with Rnote, you already have that and it’s still in early development. Rainbow and Lorien lack this support, so will only be of interest to people who also want to contribute and have their own way.
Because of its many features and strength at teaching, we have a clear winner: OpenBoard. Developed by a university for the teaching staff, it has many contributors who teach and learn. They also use it in their own teaching, and it even contains quiz modules, and custom modules that you can add yourself using JavaScript. If you want a powerful tool to teach and explain things, this should be your first port of call.