@inbook {MATHEDUC.06451920,
author = {Kilhamn, Cecilia},
title = {Hidden differences in teachers' approach to algebra -- a comparative case study of two lessons.},
year = {2013},
booktitle = {CERME 8. Proceedings of the eigth congress of the European Society of Research in Mathematics Education, Antalya, Turkey, February 6--10, 2013},
isbn = {978-975-429-315-9},
pages = {440-449},
publisher = {Ankara: Middle East Technical University},
abstract = {Summary: Algebra is a multi-dimensional content of school mathematics. In this study a fine-grained analysis was made of two lessons on introduction of variables in two Swedish classes with teachers who followed the same curriculum. When comparing the two lessons subtle differences were found in the approach to algebra and the meaning of variable in what at first seemed to be lessons about the same content. Findings indicate that teachers shape the opportunities of learning by the approach they take.},
msc2010 = {H20xx (D30xx D40xx)},
identifier = {2015d.00688},
}