to 592 students as a self-report inventory immediately after they took a TOEIC test. The CDS were then used to develop TOEIC learning materials which were trialed in a TOEIC skill-building course for 22 students. According to comparisons of pre- and post- course TOEIC scores, it was concluded that the use of CDS-based TOEIC learning tasks, which include advice on test-taking strategies, in a www-based course may help students improve their TOEIC scores.