Writing boards

A writing board for retaining material for writing on, the writing board comprising a main board defining a surface and a material retaining arrangement configured to retain material on the surface, the retaining arrangement comprising a retaining portion moveable between a first retaining position at which the material can be retained thereby on the writing board and a second retaining position that allows the material to be removed from the writing board, the retaining portion bearing a first part of a two part snap fastener which the first part is releasably engagable with a second part of the two part snap fastener located on the writing board, one of the first and the second parts having a projection that locates in a re-entrant portion in the other of the first and the second parts to extend through a hole in the material being retained thereby when the retaining portion is in the first retaining position.