This dissertation was made since we wanted to investigate the conception called quality within the school sector. What it means and if there is something that can give an explanation of how they  at look at the conception within the school sector. This will be the benchmark through the dissertation, trying to find out the most important things which might be equal to quality within the school.To find the answers of our questions we will read literature according to the subject. To get an increased understanding we will interview some people within the school efficacy, and give students a survey to fill in.The most important results from our investigation is to look at everything in its entirety, not only look at what grades students get. Even though this the most narrated sign of quality.