Analysing teachers' knowledge about sampling using TinkerPlots 2.0

International audienceThe conceptualization of sampling is crucial to understand statistical data. However, the teaching about sampling is not generally emphasised in school curriculum. This study investigated how teachers understand about size and representativeness of samples using TinkerPlots 2.0 software. The study was comprised of two sessions. A semi-structured interview and a familiarization about the basic use of TinkerPlots were developed during the first session, and participants engaged in three tasks on sampling using TinkerPlots during the second session. As a result, the teachers began to consider aspects of the variation of data to determine when representative samples were involved in TinkerPlots. The ability to select samples and analyse them seemed to contribute to improve their understanding about sample size and representativeness