Abstract: A computerised teaching apparatus that comprises: a plurality of items, for example cards (9), each comprising a computer-readable medium, preferably a RFID tag, arranged to store data that corresponds to a physical attribute of the card (9). The apparatus further comprises a reader (7) that is arranged to generate input signals, each input signal representing the data stored on the computer-readable medium of one card (9). The apparatus also comprises a computer (1) programmed to receive the plurality of input signals sequentially and arranged to generate, in response to a detection of a stored predetermined combination of input signals, an output signal representative of that combination.