Educators must trust that the classroom environment will act as the “Third Teacher” and it’s intentional organization and placement of materials will support student learning. Playfully Inspired: A Journey Through Early Learning ≈≈
From First Grade Fresh. I've done this with a good ol' low-tech overhead projector set on the floor by a wall, and the kids loved it! Of course, you could do the same thing with a doc camera, and wouldn't even need the transparent tiles.
Reggio Inspired Overhead Projector Play and Learn Ideas