\input zb-basic
\input zb-matheduc
\iteman{ZMATH 2014e.00494}
\itemau{van Galen, Frans; van Eerde, Dolly}
\itemti{Solving problem with the percentage bar.}
\itemso{Indones. Math. Soc. J. Math. Educ. 4, No. 1, 1-8 (2013).}
\itemab
Summary: At the end of primary school all children more of less know what a percentage is, but yet they often struggle with percentage problems. This article describes a study in which students of 13 and 14 years old were given a written test with percentage problems and a week later were interviewed about the way they solved some of these problems. In a teaching experiment the students were then taught the use of the percentage bar. Although the teaching experiment was very short -- just one lesson -- the results confirm that the percentage bar is a powerful model that deserves a central place in the teaching of percentages.
\itemrv{~}
\itemcc{F83}
\itemut{percentage; model; design research}
\itemli{}
\end