Simple Machines Discovery

Overview

In this third lesson of “Builders & Innovators,” students hunt for everyday examples of simple machines—levers, pulleys, and wheels—to match each machine to how it helps people do work. They then explain their findings using simple science vocabulary and drawings.

Learning intentions

• Students will be able to identify lever, pulley, and wheel simple machines in classroom and home/community objects.
• Students will be able to describe what each simple machine does (helps move or lift, changes direction, reduces effort, or makes movement easier).
• Students will be able to record observations using drawings, short sentences, and/or labels.
• Students will be able to collaborate to plan and carry out a safe scavenger hunt and share results.

Success criteria

• I can find at least one example each of a lever, pulley, and wheel.
• I can tell how each machine helps (for example: lifts, pulls, or changes direction).
• I can record my findings with a drawing and the correct simple machine name.
• I can explain my choices clearly to my partner.

Curriculum links

• NGSS-aligned Science and Engineering Practices: asking questions, planning and conducting investigations, and using models to communicate ideas.
• Common Core Reading and Writing: using evidence from observations to inform explanations (foundational informational text for younger learners; structured descriptions for older learners).
• Common Core Speaking and Listening: engaging in collaborative discussions and presenting findings.
• Common Core Mathematics: measuring or counting simple quantities during the hunt (optional quick counts).

Lesson structure (240 minutes)

1. 0–20 min | Launch + safety setup

• Teacher models what counts as a lever, pulley, and wheel using 2–3 obvious examples (door handle, sticky tape roll, string-and-straw pull).
• Establish scavenger hunt rules: stay in bounds, handle objects gently, and agree on who records each item.

2. 20–55 min | Mini-instruction with “function focus”

• Short, hands-on demonstration stations (circulate with one object at a time):
• Lever: push down to lift a small item (book as “base,” pencil as “bridge” if needed).
• Wheel: roll a toy car or marble and note “moving easier.”
• Pulley: demonstrate direction change and pulling effort with string and a ring/roll.
• Students practice “I notice… I think… because…” using teacher prompts.

3. 55–140 min | Scavenger hunt rounds (paired collaboration)

• Round 1 (30 min): Students find and photograph/collect (paper-only) examples of levers.
• Record: name, drawing, and one sentence: “This is a lever because it helps lift/move when you push or pull.”
• Round 2 (30 min): Find pulleys. Use safe “pull toys” or household items (clothesline with a strap, window blind pull-cord type where accessible).
• Record: “This pulley changes direction/pulls something up.”
• Round 3 (25 min): Find wheels/rolling objects (bottle cap wheels, wheels on a toy, rolling carts, door rollers).
• Record: “This wheel helps move things more easily.”
• Final 0–10 min inside this block: students review each other’s picks and adjust labels if needed.

4. 140–185 min | Create the Simple Machines Map

• Students make a “Museum” page or poster: three sections labeled Lever, Pulley, Wheel.
• Each section includes: one labeled drawing plus a function statement using sentence stems.
• Teacher supports accuracy: remind students to connect the example to the function (not just the object name).

5. 185–215 min | Share-out discussion + evidence

• Students present their top two finds. Each student/partner uses a structure:
• “My example is a ____. I know because ____. It helps by ____.”
• Partner asks one question and gives one improvement suggestion (teacher models acceptable question stems).

6. 215–235 min | Quick check + tidy

• Teacher collects “one card” from each student: a blank card with three boxes where they quickly sketch one lever, pulley, and wheel and label them.
• Students tidy and return materials.

7. 235–240 min | Exit reflection (60-second oral or written)

• Students answer: “Which simple machine helped most in your hunt, and why?”
• Teacher notes misconceptions (for the next lesson’s reteach).

Resources

• Everyday items for hunt (teacher-selected): door handle, flat spoon/pencil “lever,” toy car wheels, bottle caps, string, cups, straws, small rings/safety clips.
• Paper “Museum Map” templates with three labeled boxes.
• Pencils, crayons/markers, clipboards (optional), and scissors/glue.
• Sentence stems for younger and older learners (teacher-prepared).
• Safety guidance cards (simple verbal reminders).
• Optional: small measuring tape or number cards for quick counts (wheels rolled, pulls tested).

Assessment

• Formative: teacher observes the hunt and listens for correct machine identification and correct function explanations.
• Artifact: museum map page scored with a simple rubric (labels correct, function statement present and related to observation).
• Exit card: quick sketch-and-label check to confirm understanding of lever, pulley, and wheel.

Differentiation

• Support for Year 1: provide picture word bank (Lever/Pulley/Wheel icons), sentence stems with word bank, and fewer items to choose from during the hunt.
• Support for Year 5: require function details using “changes direction/reduces effort/helps lift” language and one comparison statement (lever vs pulley).
• EAL/SEN strategies: allow oral responses recorded by the teacher or via drawing; use consistent stems; keep directions short and repeat.
• Extension for advanced learners (optional during sharing time if ready): students test one example briefly (for example, compare two ways to lift something: direct lift vs lever) and report what seemed easier and why.