Write, draw and work through materials together, in real time. It stays sharp and usable on a laptop, a tablet, and the phone your student is probably on.
Textbooks, PDFs, images and audio, laid out on a canvas that doesn't run out and marked up together. Group things, work in layers, highlight what matters.
You can see each other's cursor. Easy to point at something while you explain. Easy to see where your students are looking.
The board is built from real objects rather than pixels, so on a phone it re-flows and stays sharp. A screen-shared PDF at 6pt over a compressed video feed doesn't.
The board has an AI of its own. Ask out loud or in writing for a shape, a diagram or an example, and it appears on the board as objects you can move and edit. No hunting for a tool, no leaving the lesson.
Ask the AI for a quadratic and it appears properly typeset. Ask for the graph and it is plotted. Ask for a short lesson on the topic and it lays out headings, text and pictures for you, ready to teach.