In a contemporary world saturated with technology, where data has become a means to understand and optimize almost everything, the educational sector seems reluctant towards it. In order to change that, it is argued that formative assessment is a sustainable way to monitor feedback data for the purpose to improve school environment. Used in the classroom, it shifts the focus from the outcome of pupils’ learning to their real needs. This study elaborates on the lack of feedback for teachers and the referring potential of technology usage in schools. Due to, inter alia, a co-creation workshop, novice teachers and designers collaborated to create several prototypes, which were used in a real classroom situation afterwards. Those prototypes enabled a deep understanding of the current perception of feedback as well as the technology awareness of students and teachers. The research results were discussed from various angles, including young teenagers’ and experienced teachers’ views. The outcome analysis led to the need of a student-centred curriculum which offers explorative access to technology and feedback for everybody involved in a school environment.