抄録
The author has been administering a computer-assisted English learning program called IETW to students and adult learners for more than ten years. Those who participated in the program showed significant improvements in post-TOEIC. However, the author always wondered how to evaluate the improvements of those who started from different pre-test scores and showed the same score increase. To resolve this issue, in this study the author compared three formulas for standardizing the score increases, and as a result, concluded that his own original formula is better than formulas using the natural logarithm or an approximate expression because it describes students' efforts more accurately than the other formulas and is easier to use.
