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TitleDiscovering equivalent fractions and introducing fraction notation, Clip 1 of 5: Boats and fish, a conversation about building models

DescriptionIn the first clip, researcher Carolyn Maher began the session with a discussion about a model that Mark had made for another class. The model was comprised of a boat, a fish, and two children. The...

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TitleContinuing to explore fraction comparisons, Clip 1 of 7: Gregory and Danielle compare two thirds and one half

DescriptionIn the first clip a visitor worked with Danielle and Gregory on the second task of comparing two third and one half. Danielle showed her using the twelve-centimeter long model, that three fourths was...

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1 Analytic found

TitleFraction as number, an introduction, Clip 1 of 8: Assigning number names to rods

DescriptionThis video was recorded during the first of many research sessions in a yearlong study conducted in a fourth grade classroom by researcher Carolyn Maher and colleagues. At the start of this session,...

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2 Analytics found

TitleFraction as number, an introduction, Clip 7 of 8: Erik and Alan pose problems as partners

DescriptionIn clip seven, researcher Carolyn Maher told the students to use the remaining class time to challenge their partners with problems using the rods. Erik asked Alan, “If a light green was one third,...

10

1 Analytic found

TitleFraction as number, an introduction, Clip 5 of 8: What is the unit?

DescriptionIn the fifth of eight clips from this session, researcher Carolyn Maher asked the class to give a number name for the red rod if the brown rod was called one. Danielle explained that it would be...

11

2 Analytics found

TitleContinuing to explore fraction comparisons, Clip 6 of 7: Erik and Alan compare one half and three fourths

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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1 Analytic found

TitleRevisiting construction of large models to compare fractions, Clip 2 of 5: Alan finds the difference between one half and two fifths

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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1 Analytic found

TitleRevisiting construction of large models to compare fractions, Clip 4 of 5: Alan reasons about the third model he constructed

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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1 Analytic found

TitleContinuing to explore fraction comparisons, Clip 7 of 7: Erik and Alan compare two third and three fourths

DescriptionIn the seventh clip, Erik and Alan worked to extend their model using the orange and red train to show fourths and halves. They concluded that three fourths was larger than two thirds by one twelfth....

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1 Analytic found

TitleContinuing to explore fraction comparisons, Clip 5 of 7: Michael and Brian compare two third and three fourths

DescriptionIn the fifth clip Michael and Brian extended their model using the orange and red train to show thirds and twelfths in addition to fourths. They showed that the difference between two thirds and three...