DescriptionIn the fifth of six clips in Series 4 of Exploring Linear Functions, Ariel, a 7th grade students in an after-school enrichment program, continues his work on Guess my Rule problem 5 with teacher/intern Gilberto Ladino. Ariel generates consecutive values for Y, first by adding three to the preceding value. When Ladino poses larger values of X, Ariel uses proportional reasoning to predict the corresponding value of Y, only to find that the results are incorrect when checked by continuing recursively. Ladino focuses Ariel's attention on the the numerical difference between each successive value of Y and the Y value when X is zero. As Ariel notices that these numbers are successive multiples of three, he proposes the explicit rule: "times 3 plus 8". However, when asked whether this would work for X equal zero, he modified his rule to become: "times 3 minus 8"
Guess My Rule Problem 5.
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 Early algebra, investigating linear functions, series 4 of 7, Guess My Rule problems 4 & 5, Clip 5 of 6: Solving problem 5 Date: 2009 Author: Baldev, Prashant V. (Rutgers, the State University of New Jersey)
Name: Urban, seventh-grade students building early algegra ideas in an informal after school program Reference: QA.B175 2009
Source Title: B28, Early algebra, investigating linear functions, Guess My Rule introduction group 2 (student view), Grade 7, November 3, 2005, raw footage. Identifier: B28-20051103-PFLD-SV-IFML-GR7-ALG-VAR-RAW
Source Title: B29, Early algebra, investigating linear functions, Guess My Rule introduction group 2 (teacher view), Grade 7, November 3, 2005, raw footage. Identifier: B29-20051103-PFLD-TV-IFML-GR7-ALG-VAR-RAW