\input zb-basic \input zb-matheduc \iteman{ZMATH 2013a.00116} \itemau{Haara, Frode Olav; Smith, Kari} \itemti{Increasing the use of practical activities through changed practice. A case-study examination of the influence of a value-based intervention on two teachers' use of practical activities in mathematics teaching.} \itemso{Math. Enthus. 9, No. 1/2, 77-110 (2012).} \itemab Summary: This study sets out to examine the influence of a value-based intervention on two elementary school teachers' use of practical activities in mathematics teaching. The intervention was a ``values and knowledge education" (VaKE)-based in-service course that introduced the two teachers to a value-based approach to mathematics teaching. The introduction included examples that were supported by use of practical activities. Interviews prior to the intervention made the teachers aware of an inconsistency between the desired and actual practice of their own teaching. The intervention provided them with a possibility of narrowing the gap between vision and practice by changing practice. Qualitative data show how the VaKE approach offered an alternative that opened up for increased use of practical activities in the teaching of mathematics, but also showed how good intentions of changing practice might be restrained or hindered by beliefs and previous experience. \itemrv{~} \itemcc{B50 C70} \itemut{beliefs; practice; practical activities; values and knowledge education} \itemli{} \end