Abstract: An accessory case includes a pair of molded matable sections with each defining a peripheral ridge about a body region for mating with the other section of the pair. One of the matable sections defines an interior pocket for releasably retaining an optional accessory magnet. The magnet may be disc shaped or formed as an elongate ruler. A reusable writing surface is optionally retained by a body region of one of the pair of molded matable sections. The writing surface and instrument may be a dry erase board and marker, a chalk board and chalk, or a note pad and pen or pencil.