Introduce a new digital tool into a classroom expecting it to replace the whiteboard, and it is often the whiteboard that keeps getting used anyway, for exactly the moments a screen cannot cover as well. It gets used more than any digital tool in most classrooms because it lets a teacher think and write in real time, visible to everyone at once, without a device in the way. Understanding why that keeps happening is what stops a school from underinvesting in it while over-investing in the technology meant to replace it.
