1. An electronic handheld learning aid comprising: memory means for storing digital data representative of the letters of the alphabet, the digital data being arranged so as to be representative of the correct spellings of a plurality of words in a human language; random access generating means for randomly selecting digital data representative of a selected one of said plurality of words stored in said memory means; presentation means for providing at least an indication as to the identity of said selected one of said plurality of words; operator input means for receiving an input from an operator of the learning aid representative of a plurality of letters of the alphabet as an attempt to spell said selected word chosen by said random access generating means; said memory means being operatively coupled to said operator input means for storing digital data representative of certain letters of the alphabet arranged so as to be representative of the spelling of a word in a human language corresponding to the input from an operator as received by said operator input means; means enabling alternatively said random access generating means or said memory means to store digital data representative of the spelling of a word corresponding to the input from an operator as received by said operator input means; digital logic means including comparator means coupled to said random access generating means, said operator input means, said memory means and said presentation means for alternatively comparing the input received by said operator input means from an operator with said selected word chosen by said random access generating means or the input received by said operator input means from another operator with the word represented by said digital data stored in said memory means corresponding to the input from a first operator as received by said operator input means and for providing a difference signal indicative of any difference therebetween; and said presentation means being responsive to the presence or absence of said difference signal for providing a presentation indicative of the appropriateness of the input received by said operator input means with respect to said selected word chosen by said random access generating means or the word represented by the digital data stored in said memory means depending upon which one of said random access generating means and said memory means is enabled.