Short kids … tall kids … big kids … small kids. Growing children are interested in size, and it is one of the first attributes they use to categorize objects. But how can we sort a group of objects that are all the same size?

Students are challenged to sort the 8 materials cubes at least 3 ways, each time by different properties, e.g., dull vs. shiny or heavy vs. light. Special attention is paid to groupings by weight and type of material. After comparing their results, students add some classroom objects to their groupings.

By the end of this investigation, students will be thinking about the cubes in terms of such categories as weight, color, texture, hardness, luster, and type of material.

Learning Goals

• to become familiar with the range of properties that can describe materials
• to begin organizing properties into larger categories such as color and texture

Sequence of experiences
1. Ask the question	All Class	10 Mins
2. Sort the cubes	Small Groups	15 Mins
3. Share the data	All Class	10 Mins
4. Make meaning	Discussion	10 Mins

Materials and Preparation

For the class:

• Post the investigation question in a place where all students can see it.
• Post the table of properties the class compiled in the last session.
• Gather 10–12 common classroom objects.
• 2 cubes that have been cut in half

For each group:

• 1 set of the material cubes

Concept Cartoon

The Materials Concept Cartoon is typically used as a formative assessment at the end of this investigation.