Face-to-Face collaborative systems for people with autism spectrum disorders use strategies to motivate/force the collaboration among users. However, even the collaborative applications developed for this public, still do not consider notions of awareness for these users that present difficulties to understand the most basic concepts of a collaborative activity. Users with autism present difficulties to recognize and to interpret gestures and mental states of others, which restricts their capacity to understand implicit information that are essential to being aware of what is happening around them, and consequently, to perform the collaborative activities. In this work, we investigate some questions about how to offer awareness support, especially for users with low-functioning autism, in order to formulate and evaluate a set of collaborative strategies to support the design of more appropriate collaborative systems. For this purpose, we used the research-action methodology. Following this methodology, we perform four research cycles of action and reflection about proposed solutions, so that we could conceive the set of collaborative strategies proposed. In this cyclic process, we verified that collaborative systems shall offer awareness mechanisms in the interface (based on certain requirements) in different levels of approximation of the collaboration as well as activities to get users to know each dimension of collaboration, and gradually understanding it as a whole. These aspects compose the set of collaborative strategies conceived in this work.