How far has "time-spent-on-the-task" by pupils and teachers proved to be crucial variable in classroom research?

الملخص EN

The question wich arises nowadays ; is whether the variable " time spent on the task " can be really considered as crucial in the teacher ’ s and pupil’s lives in the classroom.

The study also shows that this variable can be used by teacher as an effcient tool to control pupil’s performance on a particular task.

But the most important issue in this study is that teachers should find a powerful strategy that enable them to place greater control over time that can be spent by pupils in and outside the school, otherwise pupils cannot learn in a more afficient way.