By Carolyn A. Maher (auth.), Carolyn A. Maher, Arthur B. Powell, Elizabeth B. Uptegrove (eds.)
Combinatorics and Reasoning: Representing, Justifying and construction Isomorphisms is predicated at the accomplishments of a cohort crew of rookies from first grade via highschool and past, focusing on their paintings on a collection of combinatorics projects. through learning those scholars, the Editors achieve perception into the rules of evidence development, the instruments and environments essential to make connections, actions to increase and generalize combinatoric studying, or even discover implications of this studying at the undergraduate point. This quantity underscores the ability of getting to easy principles in construction arguments; it exhibits the significance of supplying possibilities for the co-construction of data through teams of newcomers; and it demonstrates the worth of cautious building of acceptable projects. additionally, it files how reasoning that takes the shape of facts evolves with little ones and discusses the stipulations for helping scholar reasoning.
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Additional resources for Combinatorics and Reasoning: Representing, Justifying and Building Isomorphisms
Michael’s strategy differed significantly from that of his classmates. He drew diagrams of the different color shirts and jeans, but said that he had arrived at three combinations: a white shirt with white jeans, a blue shirt with blue jeans, and a yellow shirt with yellow jeans (see Fig. 5). Although Stephanie and Dana pointed out that the shirts and jeans did not have to be the same color, Michael did not make any changes to his own solution. 2 Third-Grade Problem Solving In the third grade, the students were again given the shirts and jeans task.
The problem also requires students to think about how to justify their solution to others and convince others that they have found all the combinations. It has the potential to give rise to the need for direct or indirect arguments (Fig. 1). There are six combinations. In the figure, the letter “B” indicates a blue item, “W” indicates a white item, and “Y” indicates a yellow item. The shirt colors are listed on the left and the jean colors are on the right. The blue shirt can be combined with either the white jeans or the blue jeans to form an outfit; so two (and only two) outfits can be made using the blue shirt.
In the second grade, Stephanie listed the outfit combinations by using the initials of each color and recording the combinations in a vertical format (see Fig. 2). When working on the towers task, she again used initials for the colors of cubes using a grid organization to show the different towers. Stephanie also used the heuristic of controlling for variables as she organized her tower combinations, a strategy that her partner Dana had used in the shirts and jeans task. Milin’s strategies of considering simpler cases and pattern recognition were powerful tools in his building of an inductive argument.