A study was undertaken to determine the effectiveness of a spelling instruction method using a computer spell-checking program. The proposed teaching methodology is supported by theoretical hypotheses drawn from the field of cognitive psychology associated with the learning of spelling and pedagogical principles associated with the teaching of spelling. Subjects were 20 francophone and 5 anglophone federal employees in Canada. All were pretested for French spelling problems using a standardized test. After familiarization with the operation of the computer software, students engaged in structured exercises involving editing and correction of spelling over a period of four weeks, in two sessions a week. The exercises were based on individual spelling problem patterns. Subjects were then post-tested with the same standardized instrument used for pre-testing. Results indicate that the intervention was effective for certain error types, but some inadequacies were found in the grammatical typology used and in the lexical distinctions possible with the spell-checker. The software was found to be useful for identifying subjects with a deficient strategy for correction. The method is seen as having significant potential for instructional purposes, especially with some further software development. (MSE)