Patent US 6,728,512

A teaching system having a plurality of self-contained teaching units (5, 6, 7). Each unit has a programmable processor to carry out a study programme, a display (9), an input device (10) and a memory (12) for storing data input by a user. The system also has a central processor (1), to which each reaching unit can be connected directly or indirectly, for generating and downloading insructions to enable the teaching units to be programmed, and for receiving and processing the content of each teaching unit memory.