期刊名称：International Journal for Mathematics Teaching and Learning
电子版ISSN：1473-0111
出版年度：2010
出版社：Centre for Innovation in Mathematics Teaching
摘要：This article discusses an open-ended problem involving quadrilaterals that is continually used each semester. The task has been posed to undergraduate and graduate students in methods and problem solving classes. The task involves drawing all possible four sided figures with corners at the dots. A four by four array of dots is included in the instructions and students are asked to develop a system for knowing when they have identified all the quadrilaterals.
