On the Effectiveness of Using Flipped Classroom in Teaching Grammar to Iranian Advanced Students of ELT

This paper aimed to investigate the impact of employing flipped classrooms in teaching grammar on Iranian advanced EFL students through an experimental research design. Two groups were created on Skype application. The groups of the participants were grouped via tossing a coin. There were 20 participants in each group. Both groups received instructions through Skype. They also had groups on Telegram, Signal, and WhatsApp to receive assignments for the members of the control group and instructions for the inverted classroom. The members of the control group received the instruction traditionally on Skype, whereas, the participants of the experimental group received the instruction in an inverted approach. Statistical test of ANCOVA was employed to investigate the differences among the participants after the 20th session to analyze the data. The results showed that learners who received instructions through the flipped classroom could outperform the control group in grammar achievement and accuracy.