This paper presents a set of software tools called that helps in the building knowledge in an autonomous meaningful learning process through an open student model and a student conceptual map explorer. This tool uses adaptive tests based on a Progressive Inquiry (PI) model and has been used for teaching Computer Architecture (in particular the domain of Computer memory hierarchy) although the proposed system is supposed to be valid for any knowledge domain. The mentioned field has been chosen due to its limited complexity but it is sufficiently general to be learnt in several disciplines with different levels of detail.