Upper secondary teachers’ stages of concern related to curricular innovations before and after a professional development course on teaching probability and statistics in-cluding the use of digital tools. In T. Dooley & G. Guedet (Hrsg.), Proceedings of the Tenth Congress of the European Society for Research in Mathematics Education . (S. 2804 - 2811). Dublin, Ireland: DCU Institute of Education and ERME.(2017).