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Solving problem with the percentage bar. (English. Indonesian summary)
Indones. Math. Soc. J. Math. Educ. 4, No. 1, 1-8 (2013).
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.
Classification: F83
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