The present study was conducted to clarify the effects of practical knowledge on the feedback given by 2 teachers with the same number of years of teaching experience in order to determine the effects of feedback on students. For this purpose, the setting was unified as much as possible by ensuring that variables such as learning content, teaching plan, teaching materials, facilities, and teaching instruments were the same in the 2 classes.
The findings showed that a teacher with practical knowledge was able to provide more accurate feedback than one with less practical knowledge. The teacher with practical knowledge was able to provide feedback and correct students in a way that ensured more solid learning outcomes. It was also suggested that a teacher dedicated to improving his/her practical teaching skills would be able to respond adequately and quickly to different circumstances in the classroom. These findings show that, even with the same number of years of teaching experience, being in an environment where a teacher can improve his/her pedagogical knowledge content will aid acquisition of practical knowledge, thus making a difference to student performance.