DescriptionAfter a discussion in clip four of this series about how many towers can be built three cubes high when selecting from two colors, researcher Alice Alston asks the students to create towers three cubes high to see how many there are, reminding the students that all the towers must be different. In this clip, Stephanie and Dana create towers three cubes high from the set of towers they created four cubes high in the Towers series. They begin by removing the bottom cube from the towers they created four high, lining up the towers with each tower above its detached cube. They then attempt to create new combinations from the cubes they have removed, but find that they already have each tower they create. Then they realize that their set of sixteen towers has a duplicate, so they tell researcher Amy Martino that there are fewer towers. After the researcher asks if there any other duplicates, Stephanie and Dana look for additional duplicates, remove them, and conclude there are eight towers.
RightsThe video is protected by copyright. It is available for reviewing and use within the Video Mosaic Collaborative (VMC) portal. Please contact the Robert B. Davis Institute for Learning (RBDIL) for further information about the use of this video.
Related Publication Type: Related publication Label: Ed.D. dissertation references the video footage that includes Towers Group Sharing, Clip 5 of 6: Stephanie and Dana work on finding towers three cubes high Date: 1992 Author: Martino, Amy Marie (Rutgers, the State University of New Jersey)
Name: Elementary students' construction of mathematical knowledge : analysis by profile Reference: QA.M386 1992
Source Title: B51, Towers Group Sharing (presentation view), Grade 3, October 11, 1990, raw footage. Identifier: B51-19901011-KNWH-PV-CLASS-GR3-CMB-T4T-RAW