The Ministry of National Education, through ICFES, applies evaluations periodically called Saber tests, which aim to contribute to improving the quality of Colombian education. In the fifth grade of the Official Educational Institution Julio Caicedo and Tellez de Cali, low test results are evident in the language and mathematics competences, so a strategy is sought that allows them to be improved and in turn motivate students. This article describes the analysis, design and development of a web tool for the creation and application of assessments by competencies for fifth grade, developed using the Agile Unified Process methodology with some SCRUM instruments. As a result, a functional prototype was presented with a modern software architecture that showed a positive perception by the teachers and students of the institution, who applied the final prototype.