Here is a cool and easy digital white board tool for you to use when teaching your class. You can use this live in class or in Google Meets. Whiteboard.chat has some really great features like different lined templates and backgrounds including graphs, music sheet, Grids, and more.
You can sign in with Google. You can share your whiteboard with a QR code, hyper link, or a class code. Scroll through the features below to see it it peaks your interest. I will dive in and create a video shortly.