1. Getting Started (1:19m)
Teacher: Tanya Sanchez
Lesson begins within the context of a problem. A ladder demonstration allows student to observe angles at various positions.

2. Student Exploration (3:22m)
The knowledge students have of how a ladder works allows them to observe the height to distance relationship.

3. Interviews (3:17m)
The teacher focuses on the relationship of how the angle changes when the ladder moves. The project director reflects on this type of student exploration.

4. Student Discussion (1:44m)
Students discuss what happens when the ladder moves. The teacher summarizes.

5. Student Work (3:44m)
Students solve problems: if given 2 measures, the height and distance or the angle measurement, they can predict the missing measure.

6. Teacher Reflection (1:21m)
Teacher reflects on the importance of group work for support, a means of assessment, and a way to expose the class to a large set of problems.

7. Interview, Project Director Meg Meyer (1:20m)
The project director remarks on variation of measurement when using measure tools on enlarged graph paper.

8. Teacher Dialogue (4:00m)
Teacher uses a model to demonstrate and relate the data to the math problem. She summarizes and connects back to the original ladder problem.

9. Interview, Teacher Tanya Sanchez(0:32m)
Teacher gives a testimonial for the Mathematics in Context program.