In order to reach a conclusion related to the first matter, I tested the students with the help of the vocabulary and knowledge test which I prepared considering the content of the course. The data collection tool (Appendix 1) was applied to the second grade students right after the formal lectures were launched (pre-test) before any of the requested information was taught to the students, and reapplied in the end of the semester (post-test), which was three months later. Randomly selected items (5 out of 24) from the vocabulary part and (12 out of 42) from the knowledge part were asked to the fourth grade students during the interview sessions in the last week of the semester. Each session took no longer than 20 minutes for each student in the pre-test and post-test applications, and 5 to 7 minutes in the interview sessions. The subjects were informed that it was a research about the course, and that the results would not affect their grades, so that they should feel comfortable. They were also discouraged from giving responses that they were not sure about to assure that the data would reflect what is not by chance or luck. The data were gathered and examined separately for the pre-test and post-test sessions, which were applied to the second grade subjects, and results were compared. Following these analyses, the findings were compared to the results that came from the fourth grade subjects to determine about the approximate vocabulary and knowledge retention rate. The findings were presented in percentages, and discussed in the findings part of this article.