A computer-assisted instructional (CAI) course, WRITE, was used at the Poughkeepsie, New York, Middle School to help 5th through 8th graders with spelling and word usage problems. The course used the Coursewriter III language and an IBM System/360 computer; students received self-paced instructional programs at typewriter terminals. All teaching was done by examples, the stress was on spelling patterns rather than individual words, and the goal was to have students reach a level of acceptable orthography. An experimental-control, pretest-posttest design was employed. Results from the Lincoln Intermediate Spelling Test showed that the experimental group made significantly greater gains. In both control and experimental groups there was no appreciable difference associated with socio-economic status (SES), but there were significant differences between control and experimental groups for all SES levels. In addition, the control groups improved significantly in five of 20 categories of spelling errors, the experimental in 11 of 20. It was concluded that CAI was an efficient means of teaching spelling, that it was sensitive to individual needs, effective for weaker students, and useful for remedial work. (PB)