This paper reports on the development of a learning design addressing pre-calculus concepts using augmented reality-technology. In a first step, both task- and technology design-principles are derived from the research literature and both elements – tasks and technology – will be described and discussed. Within a first design-research cycle, the paper reports on experimental difficulties with the technology used for the first version of the AR-tool and the needs for the development of a second version. By doing so, the paper addresses technological constraints experienced in experimental situations and discusses alternative ways.