This paper presents the design and development process of an innovative learning analytics tool tailored to address the challenge of generating analytics for diverse, constructionist, open learning tools. The paper outlines the preparatory phase, which informs a co-design compo-nent aimed at eliciting data requirements and establishing a shared con-ceptual framework among educators regarding the monitoring of 21st-century skills using open learning tools. Through this process, common understandings and agreed-upon metrics for assessing skill cultivation were identified. Subsequently, the paper delineates how these insights were translated into functional and technical specifications for the devel-opment of a learning dashboard. Finally, a report is given on the results of a preliminary evaluation, giving promising indications that the designed tool effectively addresses the identified challenges. This paper contributes to the advancement of learning analytics by offering a systematic app-roach to designing tools that support the cultivation of 21st-century skills in diverse learning environments.