The Effects of the Language Used During Instruction on Students' Performance in Learning Grammar Patterns

In recent years, English language teaching in Turkey has greatly evolved due to the modern teaching techniques and methods, most of which encourage teachers to embrace indirect teaching styles heavily based on communicative activities. It is believed that teaching English through English is the utmost way of teaching, and teachers are urged to avoid Turkish in the classroom. The purpose of this study is to investigate the effects of the language used during instruction on students’ performance in learning grammar patterns. For this, two groups composing of 31 students participated in the study. In order to validate that the groups were comparable to each other, a background test that is made up of general English questions at pre-intermediate level was carried out. After the background test, the control group (19) was taught Present Perfect Tense using English completely, while the experimental group was taught the tense by explaining both in English and Turkish, respectively. A comparison test will be carried out to see if there is a significant difference between the control group that received the input in English fully and the experimental group that was taught using English and Turkish.