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*Davis, Robert B. (Robert Benjamin)*in Name1

DescriptionIn this short clip, James explains to Robert B. Davis his solution to the problem: Which is larger, one fourth or one ninth, and by how much? After some questioning, he explains that the train (i.e.,...

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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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DescriptionIn clip 5, researcher Carolyn Maher then asked the students to compare one half and one quarter and determine the difference between the two. The students worked in their groups to build models that...

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DescriptionIn the third clip Alan presented another model to show the difference between one half and one third. He built a model using one dark green rod, two light green rods, three red rods, and six white...

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DescriptionIn clip 4, researcher Carolyn Maher asked the class to determine the number name for the white rod in the first model that had been built, in which the orange and red train was called one. James,...

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Date Created1993-10-29

DescriptionThis video comes from The Private Universe Project in Mathematics and includes excerpts from interviews as well as narrative voice-over, interspersed with footage of students engaged with problem...

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DescriptionIn the tenth of eleven clips from the first day of the Early Algebra Ideas 6th grade class sessions,
all but three of the students claim to know the general "secrets" for finding values that make a...

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DescriptionIn the sixth of eleven clips from the first day of the Early Algebra Ideas 6th grade class sessions, the researcher, Robert B. Davis, challenges students to try to find more than one value for each of...

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DescriptionIn the seventh of eleven clips from the first day of the Early Algebra Ideas 6th grade class sessions, the students look for patterns for finding a solution to the problems. As solutions are...

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DescriptionIn the fourth of eleven clips from the first day of the Early Algebra Ideas 6th grade class sessions, the students work in small groups to find and record solutions for the first two of a series of...