Investigating the processes of Mathematical Problem Solving with Technology of experienced mathematics teachers: The case of Sofia

International audienceThis paper aims to characterize the processes in which mathematics teachers engage while solving non-routine mathematical problems and express their reasoning with technology. The descriptive model Mathematical Problem Solving with Technology was used to analyse an experienced teacher's utterances and actions while solving a mathematical problem with a spreadsheet. Our findings reveal the complexity of expert problem solving with technology, through regulation processes and several micro-cycles involving the processes integrate and explore. The teachers' techno-mathematical fluency seems crucial to solving the problem and expressing the reasoning with technology