Rational Number Project: Instructional Module for Fractions, Decimals, and Percents

这个为期三年、耗资554,418美元的项目通过开发一个在中学水平教授分数、小数和百分比的模块，扩展了有理数项目(RNP)过去在小学层面的工作。根据NCTM标准，该模块是由大学学者和课堂教师在建构主义学习原则的基础上共同开发的，特别是在多种表征之间的Lesh翻译模式。这一发展发生在明尼阿波利斯公立学校的教室内，那里超过50%的学生来自服务不足的人群(42%的非裔美国人，13%的西班牙裔)。为了更好地满足这些学生的需求，文化和第二语言专家是该项目跨学科小组的成员之一。该单元包括23节课，涵盖了大约4-5周的教学。它包括相关的评估工具/方法以及供教师使用的书面材料和视频剪辑(在线研讨会)。该模块首先在城市教室(5年级或6年级)中开发和试用，项目人员团队在课堂教师的指导下进行教学。收集和分析学生数据(访谈、人工制品、观察)，以便为试点模块的修订提供信息。实地测试在其他教室进行，包括仅根据书面和在线材料使用的教师，以检查在不进行密集的面对面专业发展的情况下，材料可以被采用的程度。

This three-year, $554,418 project extends the past work of the Rational Number Project (RNP) at the elementary school level by developing a module for teaching fractions, decimal, and percentages at the middle school level. In line with the NCTM Standards, the module is developed collaboratively by university scholars and classroom teachers on the basis of constructivist principles of learning, particularly the Lesh model of translation among multiple representations. The development takes place within classrooms in Minneapolis Public Schools, where more than 50% of the students come from underserved populations (42% African American, 13% Hispanic). To better cater to the needs of such students, an expert of culture and second language is a member of the project interdisciplinary team. The module consists of 23 lessons that cover about 4-5 weeks of instruction. It includes relevant assessment instruments/methods and written materials and video clips for teachers (online workshop). The module is first developed and piloted in an urban classroom (5th or 6th grade), where project personnel team teach it with the classroom teacher. Student data (interviews, artifacts, observations) are collected and analyzed to inform revision of the pilot module. Field test takes place in other classrooms, including teachers who use it on the basis of the written and online materials alone to examine the extent to which the materials can be adopted without intensive face-to-face professional development.