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2 Analytics found

TitleComparing fractions and evaluating models that represent solutions, Clip 2 of 8: Comparing one half and one third, Jessica and Erik

DescriptionIn the second clip from this session, researcher Carolyn Maher asked the students if they felt confident to justify their solution to the problem: Which is larger, one half or one third, and by how...

22

TitleThe infinite number line, Clip 2 of 4: Placing integers on the number line

DescriptionIn the second clip researcher Carolyn Maher stated that the class would be studying pieces of the number line. She referred to the homework from the prior session and stated that the class was...

23

1 Analytic found

TitleReviewing rod relationships and the candy bar problem, Clip 6 of 6: Comparing 1/2 and 1/3, David's balance beam

Date Created1993-09-24

DescriptionAs the students were dispersing after class, David called over researcher Carolyn Maher to share his model. He built a balance beam using one vertical and one horizontal rod, placed two light green...

24

1 Analytic found

TitleFraction problems, Sharing and Number Lines, Clip 4 of 5: Jessica and Andrew's Number Line

DescriptionIn the fourth of five clips from a single class session, we see two students, Jessica and Andrew, placing unit fractions, ranging from 1/10 to 1/2, on a number line segment with endpoints labelled 0...

25

2 Analytics found

TitleFraction problems, Sharing and Number Lines, Clip 5 of 5: Placing fractions on the number line

DescriptionIn the last of five clips from a single class session, the researcher reviews with the students how to place whole numbers on a number line. The students are then asked to decide about the placement...

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TitleFraction problems, Sharing and Number Lines, Clip 1 of 5: Which is more, 1/4th or 1/9th of a candy bar? How much more?

DescriptionIn this clip, the first of five clips from a single class session, the researcher asks the students to review how they were able to show that 1/4 is larger than 1/9 by 5/36. The students had worked...

27

TitleBuilding large models to show equivalence, an exploration, Clip 2 of 4: A doubling conjecture

DescriptionIn the second clip, David and Meredith worked on building models to represent their solution to the problem: Which is larger, two thirds or three quarters, and by how much. David first built two...

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TitleBuilding large models to show equivalence, an exploration, Clip 4 of 4: Testing the doubling conjecture

DescriptionIn the fourth clip Erik repeated the explanation of his model to the classroom teacher. His model consisted of a train of three orange and one dark green rod and lined up four blue rods. He lined up...

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TitleB63, Madison Project: Robert B. Davis Introducing Integers With Pebbles in the Bag (Presentation & classroom view), Grade 3-5, 1950s_1960s, Clip

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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4 Analytics found

TitleFraction problems, Sharing and Number Lines, Clip 3 of 5: Comparing unit fractions

DescriptionIn a whole-class discussion in the third of five clips from a single session, students are asked to compare and order 1/2, 1/3, 1/4 and 1/5. David shares his solution that is based on building models...