Designing curriculum-based learning activities involves identifying andimplementing affordances that provide opportunities for students to engage in actionsdirected at achieving specific learning objectives. These affordances may be mediated byinformation and communication technologies (ICT) or traditional resources, peers orteachers, or other contextual features of the learning environment. The learning objectivesguide the designer’s choice of affordances, whose deployment on specific artifacts is basedon assessing the available artifacts’ mediating capabilities. Such a design approach putshigh demands on the designer’s technological, pedagogical and content knowledge. In thispaper, we discuss how we have addressed these demands by adopting a flexible co-designapproach that invites the creative blending of mobile technologies and augmented realitywith traditional resources, for the purpose of designing innovative mathematical learningactivities with high relevance for teachers’ practice and the mathematics curriculum.