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DescriptionIn the sixth clip Erik and Alan worked on the task: Which is larger, one half or three fourths. Erik showed, using the orange and red train as one, that the difference between the two fractions was...
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DescriptionIn the second of five clips from this classroom session, Alan worked alone at his desk on a new task that the researcher, Amy Martino, had posed. He built models to find the difference between one...
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DescriptionIn the fourth of five clips from this classroom session, the researcher, Amy Martino, returned to Alan and questioned him about the third model that he had built for finding the difference between one...
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DescriptionIn the third of five clips from this classroom session, David, Erik, and Meredith are building a large model on the floor in an attempt to reconstruct what they had built in a previous session....
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DescriptionIn the fifth of five clips from this classroom session, a visiting researcher asked David, Erik, and Meredith about the large model on the floor, which reflected their attempt to reconstruct the model...
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DescriptionThis one-on-one interview between Researcher Carolyn Maher and Stephanie is a 48-minute discussion that occurred in the 4th grade on the day after Stephanie and her partner, Dana, worked in their...
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DescriptionIn this 8 minutes whole class discussion about early algebra ideas (specifically with regards to integers), Researcher Robert B. Davis models adding positive and negative integers to a class of...
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Date Created2005-11-03
DescriptionIn the fourth of six clips in Series 4 of Exploring Linear Functions, Ariel, a 7th grade students in an after-school enrichment program, is given Guess my Rule problem 5 to consider. He notices...
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Date Created2005-11-03
DescriptionThe fourth of seven clips in Series 3 of Exploring Linear Functions: Graphing and sharing guess my rule problems, begins as researcher Allison McCulloch asks the group of 7th grade boys in an...
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Date Created2005-11-03
DescriptionIn the third of seven clips in Series 3 of Exploring Linear Functions: Graphing and sharing guess my rule problems, researcher Evelyn Hanna asks Ariel, a 7th grade student in an after-school...
