The search for better levels of quality in teaching has been constantly growing, the school which want to produce quality should firstly get to know its clients necessities. The present work aims to identify the variables that better influence the mathematics teaching quality, the knowledge of such aspects by the school and teachers is fundamental so that efforts to the mentioned most important dimensions can be properly driven. The data gathering was done by closed questionnaires which tried to investigate the studentsâs perception over the teaching-learning of Mathematics. In order to analyze the data, a factorial statistics analyze tool was used, which allowed to obtain a linear reduced structure of the original set pf data, by the summarization of the information within a number of variables in a smaller set of factors. Therefore, it was possible to identify six variables: assessment efficiency, student interest, teacher preparation, current investigation themes, teacherâs punctuality and preparation to tests. The teachers of the subject should turn their attention to these variables, aiming to improve their activities and help the improving of the teaching quality level.