Introducing the distributivity property of multiplication over addition is a well-known challenge in mathematics education, especially in primary school. As a contribution, this paper presents the results of a cycle of design research that focuses on the design, implementation and evaluation of a modelling activity in which 2nd-grade students are…

The connections the "Next Generation Science Standards" ("NGSS") creates between science content and practices to literacy and mathematics are especially beneficial at the elementary level. In this article, the authors present a series of lessons a second-grade teacher taught within a thematic unit that integrated standards…

Usually, multiplication is introduced to students to represent quantities that come in groups. However there is also rectangular array model which is also related to multiplication. Barmby et al. (2009) has shown that the rectangular model such as array representations encourage students to develop their thinking about multiplication as a binary…