Teacher resources and professional development across the curriculum

Teacher professional development and classroom resources across the curriculum

In Session 1, you began to explore what it means to measure. In this session, you will investigate the difference between a count and a measure and examine some of the important ideas essential to meaningful measurement. You will learn about the many uses of ratio in measurement and how scale models can help us understand relative sizes. Finally, you will investigate the constant of proportionality in isosceles right triangles and learn about precision and accuracy in measurement.

For the list of materials that are required and/or optional in this session, see Note 1.

Part A:

Measuring Accurately

Part B:

The Role of Ratio

Part C:

Precision and Accuracy

 Homework

 In this session, you will do the following: • Understand the three components of measuring: conservation, transitivity, and unit iteration • Consider the effects of partitioning a unit into smaller subunits • Understand the use of proportional reasoning and ratio in measurement situations • Use accuracy and precision to determine how much error is involved in any given measurement

 Throughout the session you will be prompted to view short video segments. In addition to these excerpts, you may choose to watch the full-length video of this session.
 Previously Introduced: New in This Session:
 Session 2: Index | Notes | Solutions | Video