This study presents the construction and analysis of a psychometric test that measure the aggressiveness in the classroom. The initial test consisted of 60 items related to the aggression of the scholastic life. It was applied to a sample of 419 students of secondary of two schools of the locality of Fontibon (Bogota, D.C.). It was reduced to 45 items after the analysis of reliability by alpha of Cronbach, obtaining a coefficient of 0.79. A factorial analysis was made applying to orthogonal rotation varimax, that allowed the abstraction of 9 explanatory factors of the aggression in the educative context, which agree in their base with the main raised theoretical positions about the aggression. As this is the first application leaves the possibility opened for future applications where it is managed to improve diverse aspects of the instrument.