Classroom Canvas Boards

A board is canvas bonded to a rigid panel, so it stacks flat, stores in a tray and does not go slack the way a stretched frame does when thirty of them live in a cupboard. That makes it the sensible classroom format. Priming means acrylic and oil sit on the surface rather than soaking in, so check the panel is primed before buying for oils. See art paper and canvas, paints and easels.