Foundations of Algebra in the Elementary and Middle Grades: Supporting Students to Make, Represent and Justify General Claims about Operations

该项目开发图像，扩展的例子和原则，说明如何在小学年级的发音，表示和一般要求的操作演变的理由，以及这项工作如何支持从算术过渡到代数在中间年级。 工作人员和教师编写人员编写的原始资料提供了1-6年级整个学年这项工作的说明和评论，帮助教师考虑这项工作的基本教学和数学方面。 一个在线课程使用原始资料作为文本，以鼓励教师在教学中实施这些想法。

This project develops images, extended examples, and principles that illustrate how the articulation, representation and justification of general claims about operations evolve in the elementary grades and how this work supports the transition from arithmetic to algebra in the middle grades. A Sourcebook developed by staff and teacher-writers provides an account of this work across the school year in grades 1-6 and commentaries that help teachers consider the underlying pedagogical and mathematical aspects of the work. An online course uses the Sourcebook as a text to enegage teachers in implementing these ideas in their instruction.