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...
DescriptionResearcher Carolyn Maher leads a whole class discussion after the students' exploration of the problem: Which is larger, one fourth or one ninth, and by how much? Several students described their...
DescriptionAt the start of the session, researcher Carolyn Maher asked the students if they remember working on comparing two thirds and three quarters. She mentioned that she had seen students build more than...
DescriptionIn the fifth clip, researcher Carolyn Maher called the class together. At the overhead, Erin, Jackie, and Jessica had built the six and twelve centimeter models. The researcher asked the class to...
DescriptionIn the third of eight clips from this session, researcher Carolyn Maher asked the students what number name they would give the red rod if the green rod was called one. Beth said that the red rod...
DescriptionIn the fourth of eight clips from this session, researcher Carolyn Maher mentioned that she had heard a student suggest that the red rod be called one if the dark green rod were called one. She asked...
DescriptionIn the second of eight clips from this session, researcher Carolyn Maher said, “Someone told me that the red rod is half as long as the yellow rod. What do you think?" Danielle responded that the...
DescriptionIn the sixth of eight clips from this session, researcher Carolyn Maher asked the students to work with their partners to come up with questions to challenge the class. Alan was first to present his...
DescriptionIn the fourth clip Michael and Brian worked together to compare one half and three fourths.
Michael built a model of an orange and red train, two dark green rods, and four light green rods. He then...
DescriptionIn the first of five clips from this classroom session, the researcher, Amy Martino, provided the students with an opportunity to briefly discuss a task that they had been working on during the...