Successful learners or high-performers delight their teachers. They are motivated and involved, complete all the tasks easily, achieve brilliant results, have no difficulties using grammar and vocabulary properly. But let’s face it, both school teachers and tutors deal more often with problematic students, such as low-achievers. They are people who don’t do well in class and who achieve results below average. Teaching low-performers is very challenging, especially in groups because they can hold back other students.