This chapter focuses on spatial ability and augmented reality-supported collaborative learning environments in mathematics education. Spatial ability is a skill frequently used not only in mathematics classes but also in everyday life. In daily life, individuals express their thoughts about places or objects within the framework of their spatial abilities. Therefore, in educational environments organized for the development of spatial ability, speaking, expressing, collaborating, and examining different perspectives are considered important. In collaborative mathematics learning environments, challenging yet educational tasks should be designed to engage students' attention and allow them to demonstrate their spatial abilities. The use of both concrete and virtual materials in these activities is seen as significant. The rigid structure of concrete materials leads to limitations in offering variety. Technology can address this limitation with providing dynamic and interactive materials. Especially Augmented Reality (AR) technology enriches educational environments by merging the real classroom environment with virtual objects, offering students the opportunity to interact using body movements instead of using input devices as keyboards and mouse. The characteristics of AR-supported collaborative learning environments are defined as interaction, active learning process, and the teacher's facilitating role. In conclusion, AR-supported collaborative learning environments provide significant opportunities in offering an interactive and natural learning experience by combining the naturalness of tangible materials and the dynamism of technology.