Science · Kindergarten · Force, Motion, and Interactions · Weeks 1-9

Introduction to Pushes and Pulls

Students explore how applied force changes the motion of an object through direct manipulation and observation.

• Common Core State Standards
• K-PS2-1

About This Topic

This topic introduces the fundamental concepts of force through the lens of pushes and pulls. Students explore how objects move, stop, or change speed based on the physical interactions they have with them. In a Kindergarten classroom, this is less about formulas and more about developing a physical intuition for cause and effect. By manipulating toys, balls, and everyday classroom items, children begin to understand that a force is required to start or stop motion.

Aligning with K-PS2-1, this unit focuses on qualitative observations. Students compare the effects of different strengths of pushes and pulls, noticing that a harder push makes an object go faster or farther. This foundational knowledge prepares them for later grades where they will quantify force and mass. This topic comes alive when students can physically model the patterns of motion through collaborative play and structured experimentation.

Key Questions

1. Analyze what happens to an object when we push or pull it.
2. Differentiate how the strength of a push changes how far an object travels.
3. Predict what would happen if two people pushed an object from opposite sides.

Learning Objectives

• Identify objects that can be pushed or pulled.
• Demonstrate how the strength of a push or pull affects an object's motion.
• Compare the distance an object travels when pushed with different amounts of force.
• Predict the outcome of pushing an object from opposite directions.

Before You Start

Object Properties

Why: Students need to be able to identify and describe basic properties of objects, such as size and shape, to understand how force affects them.

Basic Movement Concepts

Why: Familiarity with concepts like moving forward, backward, and stopping helps students understand the effects of pushes and pulls.

Key Vocabulary

Push	To use force to move something away from you.
Pull	To use force to move something toward you.
Force	A push or a pull that can make something move, stop, or change direction.
Motion	The act of moving or changing place or position.

Watch Out for These Misconceptions

Common Misconception

Objects only move if you are currently touching them.

What to Teach Instead

Children often think the force disappears the moment their hand leaves the object. Use a rolling ball on a smooth floor to show that the initial push provides energy that keeps the object moving even after contact ends.

Common Misconception

Pulling is the only way to bring something closer.

What to Teach Instead

Students may not realize they can push an object toward themselves if they move to the other side of it. Hands-on modeling helps them see that the direction of the force is relative to their own position.

Active Learning Ideas

Stations Rotation: Force Lab

Set up three stations with different materials: heavy blocks, light feathers, and rolling cars. Students rotate in small groups to test how a 'gentle' versus a 'strong' push affects each object, recording their findings with simple drawings.

30 min·Small Groups

Think-Pair-Share: Tug of War Logic

Show a picture of two children pulling a rope in opposite directions. Ask students to think about what happens if one person pulls harder, then have them share their prediction with a partner before testing it with a soft ribbon.

15 min·Pairs

Inquiry Circle: The Heavy Box Challenge

Place a heavy box in the center of the room and ask the class to brainstorm ways to move it to the door. Students take turns trying single-finger pushes versus whole-hand pushes to feel the difference in force required.

20 min·Whole Class

Real-World Connections

• Construction workers use pushes and pulls to operate heavy machinery like bulldozers, moving large amounts of earth and materials.
• Athletes in sports like soccer or basketball use pushes and pulls to control the ball, passing, shooting, and dribbling.
• People use pushes and pulls every day to open doors, steer bicycles, and move furniture.

Assessment Ideas

Quick Check

Provide students with a collection of classroom objects. Ask them to sort the objects into two groups: 'Objects I can push' and 'Objects I can pull'. Observe their choices and ask them to explain their reasoning for one or two items.

Exit Ticket

Give each student a drawing of a toy car. Ask them to draw an arrow showing how they would push the car to make it go forward. Then, ask them to draw another arrow showing how they would pull the car to make it come towards them.

Discussion Prompt

Set up a scenario with two toy cars. Ask students: 'What would happen if one person pushed this car from this side, and another person pushed it from the opposite side at the same time? How would the car move?' Facilitate a discussion about their predictions.

Frequently Asked Questions

How do I explain the difference between a push and a pull to a 5-year-old?

Keep it simple by focusing on direction. A push moves an object away from your body, while a pull brings it closer to you. Use physical gestures to reinforce this: have students push their chairs away and then pull them back in while saying the words aloud.

What materials are best for teaching K-PS2-1?

Use a variety of textures and weights. Items like tennis balls, wooden blocks, silk scarves, and toy trucks allow students to see how different objects respond to the same amount of force. Smooth floors and carpeted areas also provide great contrast for testing friction.

How can active learning help students understand pushes and pulls?

Active learning allows students to feel the resistance and momentum that define force. Instead of watching a video, students who physically push a heavy bin versus a light one develop muscle memory for the concept of 'strength of force.' This kinesthetic experience makes the abstract concept of a 'force' concrete and memorable.

How do I assess if a student understands force without a written test?

Use a performance task. Ask the student to show you a 'strong push' and a 'gentle pull' using a toy car. If they can vary the speed and direction on command, they have grasped the core concept of the standard.