Newton's Third Law of Motion Lesson Plan (TEKS 6.7C): A Complete 5E Lesson for Simultaneous Force Pairs

Chris Kesler · 10 min read

The first time I taught Newton's Third Law, I led with the famous quote: "For every action there is an equal and opposite reaction." My 6th graders dutifully wrote it in their notebooks and a week later I asked them to explain why a rocket goes up. Three kids said, "because the fire pushes it." Two more said, "the action makes the reaction." Nobody said the word pair. Nobody mentioned two objects. The famous quote, by itself, didn't get me anywhere.

What finally worked was a pair of skateboards. I'd put two students (one bigger, one smaller) facing each other and ask them to push off. The lighter student always rolled farther. Every time. Same room, same skateboards, every class. That single demo lit up the conversation: "Wait, if the forces are equal, why does one person move more?" That question is the hook. Stay there. Don't jump ahead into acceleration math. Just keep it on "equal forces, opposite directions, two objects, same instant."

That's the core idea behind this 5E lesson for TEKS 6.7C. The verb in the standard is investigate and describe applications. Kids can't get there from a quote. They have to feel the force pair, name both objects, and explain it back out loud.

⏱ 10 class periods 📓 6th Grade Physics 🧪 TEKS 6.7C 🎯 Differentiated for D + M 💻 Print or Digital

Inside the Newton's Third Law of Motion 5E Lesson

The 5E instructional model walks students through five phases: Engage, Explore, Explain, Elaborate, and Evaluate. It flips the traditional lecture-first sequence on its head. Students explore a concept hands-on before you ever explain it, which means by the time you do explain it, they have something to hook the vocabulary onto.

I switched to the 5E model years ago and stopped going back. Kids retain more, ask better questions, and stop staring at me waiting to be told the answer. The Newton's Third Law of Motion 5E Lesson is built on this framework from start to finish. Here's how it plays out across the five phases.

🎯 Engage

📷 Engage image — objective slide OR word wall card

Day one is the skateboard push-off demonstration. Two students (one noticeably bigger than the other) stand on skateboards or rolling office chairs facing each other, hands on each other's hands. On a count of three, they push off at the same instant. The class watches what happens, fills in a prediction sheet ahead of time, and a results sheet after.

The lighter student always rolls farther. Every time. By the end of the period, kids have one experience, one diagram, and one big question in their notebooks: "If the forces are equal, why does one person move more?" That question is the entire reason we teach this standard. They walk into the rest of the unit with a real problem they want to solve, not a vocabulary list.

What's included in the Engage:

Teacher directions for the skateboard push-off (with a chair-and-tile-floor alternative if you don't have skateboards)
Printable student prediction and observation sheet
Answer key with the expected outcomes and discussion questions
Four learning objective slides (standard verbatim, "Investigate and describe" highlighted, "I CAN...", and "WE WILL...")
An illustrated Force and Motion Word Wall in English and Spanish covering the full unit vocabulary

🔬 Explore

📷 Explore image 1 — wide shot of Station Lab in action

The Newton's Third Law of Motion Station Lab is the heart of the Explore phase. Students rotate through 8 stations (plus a 9th challenge station for early finishers) over one class period. The Station Lab is split into four input stations (where kids take in new information) and four output stations (where they show what they learned).

The four input stations:

🎬 Watch It! — Students watch a short video on simultaneous force pairs and answer guided questions.
📖 Read It! — A one-page reading passage at two differentiated levels, with a Spanish version included.
🔬 Explore It! — The hands-on force-pair task (the heart of the Station Lab) where students inflate balloons, release them across a string track, and identify the two objects and the two forces in the pair.
💻 Research It! — Reference cards with examples of force pairs (rocket and exhaust, swimmer and water, foot and ground, hammer and nail) and a checklist for confirming whether two forces are a true Third Law pair.

The four output stations:

📋 Organize It! — A card sort where students physically place 12 scenarios under "True Third Law Pair" or "Not a Third Law Pair" with a reason for each.
🎨 Illustrate It! — Students draw and label both forces in three force pairs (rocket and exhaust, swimmer and water, foot and ground), making sure each arrow is labeled with which object it acts on.
✍️ Write It! — Three open-ended questions in complete sentences (this is where you see who really gets it).
📝 Assess It! — A short formative check with multiple choice and a fill-in-the-blank vocabulary paragraph.

📷 Explore image 2 — close-up of featured station (Explore It! or Organize It!)

Print and digital versions are both included. If you want the full breakdown of what happens at every single station, what students produce, and how to set it up, that's in our dedicated Station Lab post.

→ Read the full Newton's Third Law of Motion Station Lab walkthrough 8 stations, materials list, teacher tips

The Station Lab is included in the full 5E lesson. You don't need to buy it separately if you're getting the whole unit.

📚 Explain

📷 Explain image 1 — Presentation slide screenshot

Here's the real payoff of doing the Engage and Explore before the Explain: by the time kids hit this phase, they've already felt a Third Law force pair on the skateboards and watched a balloon rocket take off across a string. They have a working understanding before you ever start naming things formally. The discussions get deeper, the questions get sharper, and you spend less time defining and more time pushing their thinking.

The Newton's Third Law of Motion Presentation walks 6th graders through the full scope of TEKS 6.7C one concept at a time, with real photographs and labeled force-arrow diagrams on nearly every slide. The deck opens with the big idea (when one object pushes or pulls on a second object, the second object pushes or pulls back with equal strength in the opposite direction at the exact same instant), and then builds out a single non-negotiable rule: a true Third Law pair always acts on two different objects at the same instant with equal strength in opposite directions.

📷 Explain image (middle) — Presentation slide screenshot (classification hierarchy, Essential Question, or category comparison)

Students learn the language of simultaneous force pairs in plain English. The old textbook phrasing ("for every action, there is an equal and opposite reaction") is named explicitly as misleading because it sounds like the action happens first and the reaction follows. The deck replaces it with a cleaner phrasing students can repeat: both forces appear at the exact same instant, on two different objects, equal in size, opposite in direction. There's a built-in Quick Action where students rewrite three textbook sentences in the new phrasing.

The applications half of the unit covers the four classic Third Law scenarios listed in the standard and beyond: a rocket pushes hot exhaust gas down, and the gas pushes the rocket up with equal force. A person walking pushes the ground backward with their foot, and the ground pushes the foot forward (which is why you can walk on dry pavement but slip on ice). A swimmer pushes the water backward, and the water pushes the swimmer forward. A balloon releasing air shoots forward because the balloon pushes the air out and the air pushes the balloon in the opposite direction. The deck includes a built-in Think About It on the difference between Third Law pairs (which act on different objects and therefore don't cancel) and balanced forces (which act on the same object and do cancel). That one slide saves three days of confusion later in the unit.

📷 Explain image 2 — Presentation slide screenshot

For every scenario, students see three model types: a real-world photo, a force-pair diagram with both arrows labeled by object, and a one-sentence summary that names both objects and both forces. That repetition (different applications, same three model types) is what bakes the investigate and describe applications verb of TEKS 6.7C into long-term memory.

What makes the Newton's Third Law Presentation different from a typical physics slideshow is that kids are doing something on almost every single slide. It's not a lecture deck. It's a participation deck. "Your answer:" prompts appear on most slides, Brain Breaks reset attention every few slides, Quick Action INB tasks (the True Pair vs. Not a Pair sort, a "name both objects and both forces" activity, a rewrite-the-textbook-sentence task) show up throughout, and Think About It prompts push deeper into bigger ideas like "Why does the lighter skater roll farther even though the forces were equal?" and "Is the book on the desk a Third Law example or a balanced force example?" The deck closes with a Check for Understanding tied back to the Essential Question: How can I identify and describe the simultaneous force pairs in everyday applications of Newton's Third Law?

The Explain materials in this product include:

An editable 36-slide Presentation at two differentiated levels (Dependent and Modified), works in PowerPoint or Google Slides
A guided fill-in-the-blank student notes handout that mirrors the Presentation, with answer key
A Paper Interactive Notebook (English and Spanish) students cut, fold, and glue into their notebooks
A Digital Interactive Notebook at both levels with answer keys, for 1:1 classrooms or Google Classroom

The Explain runs across two class periods. The built-in Think About It prompts are where the real discussion happens, so let those breathe.

🛠️ Elaborate

📷 Elaborate image — Student Choice Project board or sample student work

The Elaborate phase is where students stretch what they learned about simultaneous force pairs and put it into a project of their choosing. In this 6th grade physics lesson, that's a Student Choice Project board with six different project options plus a "design your own" pathway.

Students might build a balloon-powered car and walk a video tour through the Third Law pair driving it, design a comic strip where a superhero explains why she can fly using Newton's Third Law, or create a poster of five everyday applications (walking, swimming, throwing a basketball, a sprinkler spinning, a rocket launching) with both objects and both forces labeled on every panel. There are options for kids who love to write, kids who love to draw, kids who love to build, and kids who love to perform. Whatever the project, the point is the same: students apply Newton's Third Law to a real-world artifact instead of a worksheet.

Choice is the whole point. By letting students pick how they show their thinking, you get more authentic work for TEKS 6.7C and you actually get to see what they understand about simultaneous force pairs.

The rubric (the part teachers actually want)

Every project, no matter which option a student picks, is graded on the same rubric. Five categories at 20 points each:

Vocabulary (20 pts) — At least four words from the lesson are used in context.
Concepts (20 pts) — At least two key concepts from the lesson are referenced.
Presentation (20 pts) — The project grabs attention and is well-organized.
Clarity (20 pts) — Easy to understand. Free of typos.
Accuracy (20 pts) — Force arrows and the objects acting are correctly labeled. The science is right.

The rubric uses a minus / check / plus shorthand on every row so you can grade a stack of projects quickly without re-reading every criterion.

Two differentiated versions in one file

The standard version is for students ready for independent application of Newton's Third Law. The Reinforcement version is for students who need additional vocabulary or concept support. Three of the six options are swapped for projects with a tighter vocabulary tie-in, and "design your own" is replaced with "collaborate with the teacher" so kids aren't pitching cold.

✅ Evaluate

The Evaluate phase wraps the unit with a formal assessment. It's not all bubble-in. Several questions hand students a real-world scenario with one force arrow drawn and ask them to draw the partner arrow and label which object each force acts on.

The full assessment has 12 questions across five formats:

Multiple choice (4 questions) covering simultaneous force pairs, equal strength and opposite direction, two different objects, and real-world applications (rockets, walking, swimming)
Hotspot / visual (2 questions) where students circle the diagram that shows a true Third Law pair and describe the difference between a Third Law pair and a balanced force diagram
Multiselect (2 questions) where students pick all the everyday scenarios that show Newton's Third Law in action
Short answer (2 questions) on why a lighter skateboarder rolls farther even though the forces are equal, and on why the floor pushing up on a book and Earth pulling the book down are NOT a Third Law pair
Multipart scenario (2 questions) with a 3-student classroom debate where kids identify which reasoning is correct and which diagram supports it

A modified version is included for students who need additional support. Fewer multiple-choice distractors and sentence-starter scaffolds on the short-answer items.

If you've taught all five phases, this assessment shouldn't surprise anyone. It's a chance for kids to show you they get it.

How everything fits together

If you want the whole experience (Engage skateboard push-off, the Station Lab as the Explore, the Explain day with Presentation and interactive notebook, the Student Choice Elaborate, and the Evaluate assessment all in one download), that's the Newton's Third Law of Motion Complete 5E Science Lesson.

If you only need the one-day hands-on activity, the Station Lab works as a standalone. Most teachers buy the full 5E because the Station Lab works harder when it's bookended by a strong Engage and a follow-up Explain. But both are honest options.

Two options

Newton's Third Law of Motion Complete 5E Lesson cover

Full 5E Lesson — ~10 class periods $13.20 Get the 5E Lesson

Newton's Third Law of Motion Station Lab cover

Just the Station Lab — 1–2 class periods $7.20 Get the Station Lab

What you need to teach Newton's Third Law of Motion (TEKS 6.7C)

Materials beyond what's in the download:

Two skateboards or rolling office chairs for the Engage push-off (a smooth floor with rolling stools also works)
Round balloons for the Station Lab Explore It! task (one or two per group, plus a few extras since they pop)
Drinking straws and fishing line (or string) to build the balloon rocket track at the Station Lab
Masking tape for attaching balloons to straws on the track
Pencils, colored pencils or markers, and printed student pages
A device with internet for the Watch It! station and the slide deck

Standard covered: Texas TEKS 6.7C — Investigate and describe applications of Newton's third law of motion, such as rockets, walking, and a balloon releasing air. See the full standard breakdown →

Grade level: 6th grade science

Time: About 10 class periods of 45 minutes each, done with fidelity. The product also ships with a compressed sample unit plan if you need to move faster.

Common misconceptions this lesson clears up

"The bigger object pushes harder"
When a truck hits a car, students think the truck exerts more force. The forces are always equal. The car just accelerates more because it has less mass. The truck and car push on each other with identical force.
"The action force causes the reaction force"
There is no "action" that happens first and "reaction" that follows. Both forces appear at the exact same instant. The old phrasing "for every action there is a reaction" is misleading. Avoid it. Use "simultaneous force pairs" instead.
"If forces are equal and opposite, nothing should move"
Third Law force pairs act on two different objects. They don't cancel out because they're not acting on the same thing. Balanced forces (which DO cancel) act on the SAME object. This is a common confusion point.
"Gravity and the floor pushing up are a Third Law pair"
Weight (Earth pulling a book down) and the normal force (table pushing book up) are NOT a Third Law pair because they both act on the same object (the book). The actual Third Law pair for gravity is: Earth pulls book down, and book pulls Earth up.
"Forces are unequal while something is speeding up"
Students think Newton's Third Law is "paused" during acceleration, that one object must push harder to get things moving. The Third Law forces are ALWAYS equal, regardless of whether objects are at rest, moving, or accelerating.

What's included in the Newton's Third Law of Motion 5E Lesson download

📷 Inside-the-product — add screenshot of Read It passage or sample answer sheet

When you buy the Newton's Third Law of Motion Complete 5E Lesson, you get a single download with the whole unit:

✅ Engage materials — teacher directions for the skateboard push-off (with a rolling-chair alternative), student prediction and observation sheet, answer key, four learning objective slides, illustrated Force and Motion Word Wall (English + Spanish)
✅ The full Station Lab — 8 stations + 1 challenge, print and digital, two reading levels, Spanish Read It!
✅ Explain materials — editable 36-slide Presentation at two differentiated levels (with built-in Brain Breaks, Quick Action INB tasks, and Think About It prompts), guided fill-in-the-blank student notes handout with answer key, Paper Interactive Notebook (English + Spanish), Digital Interactive Notebook at two levels with answer keys
✅ Elaborate (Student Choice Projects) — 6 project options + design-your-own, plus a Reinforcement version with vocabulary-focused alternatives, 5-category rubric included
✅ Summative assessment — full 12-question version and modified version with sentence-starter scaffolds, both with answer keys
✅ Sample 8-day unit plan — day-by-day pacing guide

A couple of real-talk tips from running this lesson

1. Don't skip the skateboard push-off on Day 1, even if you're behind.

Kids who skip it come into the Station Lab with a textbook quote. Kids who do it walk into the Station Lab with a real question they want answered: "Why did Devon roll farther than me when we pushed equally?" That question carries the whole unit.

2. Retire the phrase "action and reaction" from your vocabulary.

Use "simultaneous force pair" instead, every time. Your kids will pick up the phrasing you use most. If you keep saying action and reaction, they keep thinking one happens first. If you say simultaneous force pair, the language tells them what's true.

3. Save 10 minutes at the end of the Station Lab day for a class debrief.

Hold up a book on the desk and ask: "Is gravity pulling this book down and the desk pushing it up a Third Law pair?" Wait. Make them defend their answer. That five-minute conversation is the bridge to the Explain day and clears up the biggest misconception in the standard.

Get the Newton's Third Law of Motion 5E Lesson

Buy the full Newton's Third Law of Motion 5E Lesson — $13.20

Or if you only need the one-day hands-on Station Lab:

Buy the Newton's Third Law of Motion Station Lab — $7.20

(The Station Lab is included in the full 5E Lesson)

Frequently asked questions

Does this cover all of TEKS 6.7C?

Yes. All three applications named in the standard (rockets, walking, and a balloon releasing air) are addressed across the five phases, plus several additional applications (swimming, jumping, hammering, sprinklers) for kids who want more reps.

What do my students need to know before this lesson?

A working understanding of forces from TEKS 6.7A and balanced vs. unbalanced from TEKS 6.7B. If your kids can identify a force in a real-world scenario and explain what "balanced" means, they're ready.

How long does it take to teach?

Done with fidelity, about 10 class periods of 45 minutes each: one day for the skateboard push-off Engage, two days for the Station Lab, two days for the Presentation and Interactive Notebook, three days for the Student Choice Project, and one to two days for review and the assessment. The product also ships with a compressed 8-day sample unit plan if you need to move faster.

Do I need special supplies?

Just two skateboards (or rolling chairs), a bag of round balloons, drinking straws, fishing line or string, and masking tape. Most teachers either already have these or can grab them at the dollar store for under ten bucks.

Does this work for digital classrooms?

Yes. Every component has a digital version. The Station Lab is fully digital-ready (Google Slides), the Presentation works in Google Slides, and the Student Choice Projects can be submitted as videos, slide decks, or written work.

Is this 5E lesson aligned to NGSS too?

It aligns most directly with MS-PS2-1 (applying Newton's Third Law to design a solution to a problem involving the motion of two colliding objects). Built TEKS-first, but the standards overlap heavily.