How to classify objects

General

In this lesson, students learn the steps needed to classify objects: gather objects, plan, categorize, and finalize. They will practice categorizing rocks by their observable properties in a final group activity.

Standards

NGSS: 2-PS1-1

Learning objective

Students will be able to plan an investigation to classify objects based on their observable properties.

Introduction

Students begin by discussing the different types of rocks and food they see and eat. Have them share the colors, shapes, and sizes they see, then list those characteristics. Explain that observing and classifying can help break large categories into smaller groups.

Instruction

Go over some important vocabulary, including words like “categories,” “classification,” and “properties.” Explain the steps you must go through when classifying objects. First, gather objects. Then, plan by thinking about how to categorize the objects. After this, put the objects into categories, and finally, review and finalize your categories. Students will brainstorm some ways in which they can categorize “food.”

Quiz

Students respond to multiple-choice questions.

Closing

For the final activity, students receive a colored index card. Have students find their classmates with the same color card to join into a group. Each group gets a piece of paper and a writing utensil. Refer back to the observable properties of rocks from earlier and have students classify those rocks.

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