1

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...

2

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...

3

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...

4

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...

5

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....

6

1 Analytic found

TitleDiscovering equivalent fractions and introducing fraction notation, Clip 2 of 5: David and Meredith compare one half and two thirds

DescriptionIn the second clip, researcher Carolyn Maher asked the students to build a model to show which is bigger, two thirds or one half, and by how much. The students worked with their partners to solve the...

7

1 Analytic found

TitleContinuing to explore fraction comparisons, Clip 2 of 7: Kimberly and Audra compare one half and three fourths

DescriptionIn the second clip, Kimberly and Audra worked together on the task: Which is larger one half or three fourths. Kimberly built a model using an orange and red train, two dark green rods, and four light...

8

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...

9

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...

10

TitleFraction as number, an introduction, Clip 8 of 8: Emphasizing precise language in problem posing

DescriptionDuring the eighth and final clip from this session, Meredith and Sarah are working together to make up problems for one another to solve with the rods. Meredith asks Sarah "If you called one...