Advantages of computer-assisted instruction (CAI) for grammar-oriented exercises are considered, and a learning module to help the student prepare for the Test of English as a Foreign Language (TOEFL) exam is described. The exercises are modeled on the TOEFL exam: the student is given a sentence, one part of which is incorrect and is asked to determine where the error lies. In the first exercises, which deal with structural points, an incorrect answer is followed by a detailed explanation of the error. Students are also offered the opportunity to review all of the areas previously covered. Next, a practice/self-testing mode provides the student immediate feedback and reinforcement. Structural exercises also incorporate the elements of speed and pacing by allowing the student to choose the number of seconds allotted to respond to each question. It is suggested that standard exercises designed for vocabulary development and reading comprehension are also well suited to CAI. Another area not traditionally associated with CAI is the practice of language functions, and notional-functional exercises developed by Meloni, Thompson, and Beley are described. Brief guidelines for developing CAI are also included. (SW)