* The Mamadou-Half-Rectangle video is a short segment that can be viewed as a streaming video (see the “via BlueStream” link below). In addition, background information about the lesson and video, a transcript of the video, and an abridged lesson plan for the class are included below as pdf downloads.* INQUIRIES/USES: This footage comes from an actual fifth-grade classroom taught by Deborah Loewenberg Ball. Although we cannot make the digital video available as a download here, you may request a copy for particular uses. Specifically, our agreements with students’ families and our institutional review board that oversees the protection of human research subjects allow the video to be used in ongoing, interactive work with pre-service and practicing teachers or other educators. Other uses, such as materials development efforts, research studies, presentations, as well as other types of educational uses require special permission. Please direct all inquiries to [email protected] video segment, from a fifth-grade mathematics summer program in Michigan, shows a five-minute excerpt of students discussing a math problem that asks them to identify the fraction of rectangle represented by a shaded region. A key feature of this particular problem is that the rectangle under consideration is divided into regions of different sizes and shapes. The segment focuses on one student’s (Mamadou’s) answer of one-half, his explanation, and the discussion that ensues about how his solution differs from solutions that produce an answer of one-eighth. Central in this discussion is the importance of the “whole” when identifying fractions.This material is based on work partly supported by the National Science Foundation under Grant No. 0227856. Any opinions, findings and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.http://deepblue.lib.umich.edu/bitstream/2027.42/78024/4/eml2007_lessonplan_071707_abridged.pdfhttp://deepblue.lib.umich.edu/bitstream/2027.42/78024/3/mamadou-half-rectangle_background.pdfhttp://deepblue.lib.umich.edu/bitstream/2027.42/78024/2/mamadou-half-rectangle_transcript.pdfhttp://deepblue.lib.umich.edu/bitstream/2027.42/78024/1/mamadou-half-rectangle_subtitled.mo
