Formative Assessment

Do students understand that a table and a weight line can represent the same data set?

Observing and listening to students as they use data from their notebooks to construct their own weight lines and place samples of earth materials on the line will provide evidence of understanding.

As you interpret the evidence ask, are students able to:

• Find the weight of each sample of earth material in the data table?
• Locate this measurement on the weight line?
• Place the container in the appropriate spot?
• Describe how the weight line shows how much heavier on sample is than another?

As a next step, ask students to whether they prefer looking at their weight data in a table or a weight line and explain why.