Based on the fact that, at the level of the Angolan public sector, Hipermanager is the first nonuniversity School Information System (SIGE), initially implemented in the province of Namibe, Moçâmedes municipality, this article seeks to evaluate its impact on the work processes in the dimensions: management control, innovation, productivity, information quality, user satisfaction, information security and decision making, according to the point of view of the professors of the Saidy Mingas and Nossa Senhora de Fátima Colleges. Through a questionnaire answered by seventy-eight teachers who deal with the system, the observed results indicate moderate and/or good positive impacts in all dimensions of the study, with productivity having the greatest impact. It is also found that overall productivity and satisfaction have strong positive perceived impacts, with a variation between satisfied and extremely satisfied.