Often, I find it useful to teach some Python to students. In-person classes are easy in this regard, I can just go to colab.research.google.com and show them the concepts there. (It requires no technical knowledge to use it, that's why I prefer that over locally-run Jupyter notebooks.)
Despite the claim that it is good for collaborative working, it does not update live as I write content in those notebooks, as Google Jamboard would, for example.
Are there websites which provide Jupyter notebooks (with Python 3 backend) which I could use to work with students real-time? By real-time, I mean that I want my students to see what I have written in a cell within a second at least.