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Download full textKullberg, Angelika; Runesson, Ulla; Mårtensson, Pernilla – PNA, 2014
In this paper we focus on variation of the design and the implementation of a specific task during three mathematics lessons in the 8th grade in a learning study (Marton & Tsui, 2004; Runesson, 2008). The theme of the lesson was division, with a denominator between 0 and 1. The teachers wanted their students to understand that when dividing…
Descriptors: Task Analysis, Learning Strategies, Mathematics Curriculum, Mathematics Education
Direct linkShen, Ji; Confrey, Jere – International Journal of Science Education, 2010
Understanding frames of reference is critical in describing planetary motion and learning astronomy. Historically, the geocentric and heliocentric models were defended and advocated against each other. Today, there are still many people who do not understand the relationship between the two models. This topic is not adequately treated in astronomy…
Descriptors: Space Sciences, Astronomy, Science Teachers, Teaching Methods
