Traditional user interfaces such as WIMP (Window, Icon, Menu, Pointer) interfaces are widespread in schools and have been proven to be useful in many scenarios. Unfortunately, they have shown to be unfit in the case of collaborative learning. Indeed, this type of activity at school is mainly based on physical interactions with paper, objects and often happened around a table. However, technologies have evolved and interfaces that support rich 3D interactions are becoming more and more used by HCI researchers to go beyond the paradigm of screens, mice and keyboards. In this paper, we present doctoral research that proposes to overcome current usages in classrooms by exploiting the advantages of hybrid environments for collaborative learning. We based these interfaces on tangible user interactions and spatial augmented reality that support collaboration and physical manipulation of digital content in an unique hybrid space. Interactions will be designed by applying instructional design principles as well as learning theories from cognitive science and education science. This paper also presents first results of our ongoing work as well as future directions that will involve focus groups with practitioners and experiments in classrooms.