The report begins with a brief traverse of the associated research field, leading to the specific aims and research design of the project. The outcomes are then discussed, with teacher decisions about their use of apps, and the framework and contributing themes, outlined initially. Discussion of the key themes, with exemplars and data from the project, are then considered, followed by the transitions in teacher practice and the ways that mathematical thinking emerged. The final section, the conclusions, considers the key findings, limitations, implications for practice, and suggestions for further research to further enrich the field. But first, the background literature that informed the project is examined.