In recent years, mobile and context-aware technologies have been used in an attempt to enhance students‟ formal and informal learning experiences both in the classroom and outdoor settings. Such technologies have supported teaching and learning in a variety of subjects. In this paper, we present the ongoing research efforts in our Geometry Mobile (GeM) project, where we conducted a number of trials in the last two years with primary and secondary school students in Sweden. The current trial of our GeM project (April 2011) is discussed together with the data collection method we have used for exploring how Context-Aware learning hints (CA hints) can be utilized to support the different stages of the learning activity. Insights and preliminary results from this trial are described. We also present the motivation of our proposed CA hints, the definition of the requirements of those, and the formulation of a classification thereof.