You will learn
- Define structure.
- Sort natural and man-made structures.
- Name parts of a structure.
- Describe loads.
Version 0.2 · expanded edition · built from cited public sources Content is based on the official frameworks and sources listed under Sources and standards. No official endorsement is claimed. Written in the style of common primary school assessments. No exam result is promised.
Student lesson
- Structures hold shape and carry loads.
- Structures can be natural or man-made.
- Frames and foundations give support.
- Different structures suit different jobs.
Words to know
something built or formed to hold its shape and bear weight
the weight or force a structure must support
the skeleton that holds a structure up
the base a structure stands on
1. Discover: The village bridge
Kojo crosses a small footbridge to reach school. Planks lie on two strong beams, and the beams rest on stone blocks at each bank. “The bridge holds me and my bag,” he says. “That is its load.”
Think: What would happen if the stone blocks were weak?
2. Understand: Structures
Idea 1: What is a structure
A structure keeps its shape while it supports a load. Bridges, chairs, tents, towers and even a bird’s nest are structures.
Idea 2: Natural and man-made
Natural structures include shells, spider webs and tree trunks. Man-made structures include houses, bridges and stools. Both kinds solve problems of strength and shape.
Idea 3: Parts
Many structures have a frame that holds them up and a foundation that spreads the weight to the ground.
3. Worked examples
Example 1 (I show you): Sort
Bird nest.
- Made by a bird.
- Natural.
- Holds eggs.
Answer: A nest is a natural structure.
Example 2 (We do it together): Sort
Bridge.
- Built by people.
- Man-made.
- Carries loads.
Answer: A bridge is man-made.
Example 3 (You try): Name
Foundation.
Show the steps and answer
- At the bottom.
- Spreads weight.
- Holds the building.
Answer: It is the base.
Did you know?
The Great Pyramid of Giza stood as the tallest man-made structure on Earth for nearly 3,800 years.
Why this matters
Everything we build, from houses to bridges, needs to be a safe structure.
4. Explore: Structure hunt
Walk around the school and list ten structures, then sort them as natural or man-made and name each load.
- Walk with a partner.
- List ten structures.
- Sort them.
- Name each load.
Think about it: what did you notice?
What did you notice? Every structure carries a load and has a base.
5. Practise
Say it in a sentence
Use these starters when you talk about the lesson. Say them out loud.
- A ___ keeps its shape and carries a load.
- The weight it carries is the ___.
- The ___ holds a structure up.
- The ___ is the base.
Guided practice
Question 1. What is a structure?
Holds shape.
Question 2. What is a load?
Weight carried.
Question 3. Name a natural structure.
Shell.
Independent practice
Level 1: Start
- What is a structure?
- What is a load?
- Name a natural structure.
- Name a man-made one.
- What is a foundation?
Level 2: Grow
- Why do bridges need foundations?
- Why frames?
- Why are nests structures?
Level 3: Stretch
- Do the hunt.
- Draw a structure.
- Explain its load.
Answers are in the answer key below. Try first, then check.
6. Apply: Science in everyday life
Explain what the load is on a chair.
Show a sample answer
Name the person and the bag.
Another one. Tell a family member one thing from this lesson. Use the words you learned.
Show a sample answer
A clear sentence that uses at least one word from Words to know.
7. Common mistakes
Fix: Many things are.
Fix: They do.
8. Lesson summary and revision card
- I can define structure.
- I can sort natural and man-made structures.
- I can name parts of a structure.
- I can describe loads.
9. Check and master
Answer all 14 questions. You will see feedback after each one.
Your result appears here after you answer every question.
10. Key takeaways
- Structures hold shape and carry loads.
- Structures can be natural or man-made.
- Frames and foundations give support.
- Different structures suit different jobs.
11. Next lesson
Next lesson: Strength and stability. Keep going with the next idea in this course.
Exam practice
These questions are written in the style of common school and international primary assessments. Try them on your own, without looking back. Then check your answers in the marking guide. The marks are shown in brackets.
- Define structure and load. [2 marks]
- Sort four structures. [4 marks]
- Name two parts of a structure. [2 marks]
- Safety rule. [2 marks]
Total: 10 marks.
Marking guide and model answers
- 1 each
- 1 each
- 1 each
- Any [1]; reason [1]
Score guide: 9 to 10 = secure. 6 to 8 = nearly there, revise the parts you missed. Under 6 = work through the lesson again with a grown-up.
Printable worksheet
- What is a structure?
- What is a load?
- Name a natural structure.
- Name a man-made one.
- What is a foundation?
- Why do bridges need foundations?
- Why frames?
- Why are nests structures?
- Do the hunt.
- Draw a structure.
Homework
List five structures at home and name their loads.
Answer key and marking scheme
| Question | Expected response | Marks |
|---|---|---|
| 1. What is a structure? | Holds shape. | 1 |
| 2. What is a load? | Weight carried. | 1 |
| 3. Name a natural structure. | Shell. | 1 |
| 4. Name a man-made one. | Bridge. | 1 |
| 5. What is a foundation? | Base. | 1 |
| 6. Why do bridges need foundations? | Spread weight. | 1 |
| 7. Why frames? | Support. | 1 |
| 8. Why are nests structures? | Hold eggs. | 1 |
| 9. Do the hunt. | List. | 1 |
| 10. Draw a structure. | Label. | 1 |
| Total | 10 |
Independent practice answers. Level 1: 1 Holds shape.; 2 Weight carried.; 3 Shell.; 4 Bridge.; 5 Base.. Level 2: 1 Spread weight.; 2 Support.; 3 Hold eggs.. Level 3: 1 List.; 2 Label.; 3 Sentence..
Quiz answers: 1 B, 2 C, 3 A, 4 B, 5 C, 6 A, 7 B, 8 C, 9 A, 10 B, 11 C, 12 A, Challenge 1 B, Challenge 2 C.
Mastery and remediation
| Objective | Bronze (Developing) | Silver (Proficient) | Gold (Advanced) |
|---|---|---|---|
| O1 Define structure | Shows this with help from an adult or a picture | Does this independently and explains how they know | Explains it clearly and uses it in a new situation |
| O2 Sort natural and man-made structures | Shows this with help from an adult or a picture | Does this independently and explains how they know | Explains it clearly and uses it in a new situation |
| O3 Name parts of a structure | Shows this with help from an adult or a picture | Does this independently and explains how they know | Explains it clearly and uses it in a new situation |
| O4 Describe loads | Shows this with help from an adult or a picture | Does this independently and explains how they know | Explains it clearly and uses it in a new situation |
Courseversity badge thresholds (overall quiz score): Gold = 90–100%; Silver = 80–89.9%; Bronze = 70–79.9%. A badge is never a full record of progress.
If a learner struggles
- Find the misconception: “Only buildings are structures.” Many things are.
- Explain another way: use real objects, pictures or actions first, then words.
- Show a simpler example: Classify structures.
- Guided practice: work through one example together and let the learner try the next one.
- Reassess: use the quiz again or the worksheet.
- Move on when the learner shows Silver-level evidence independently.
For parents and guardians
In this lesson your child studies structures. You do not need to be an expert to help.
- Point out structures at home.
- Ask “What is the load?”
- No climbing.
- Ask “how do you know?” after each answer, and listen.
- Praise effort, not only right answers. Mistakes are how we learn.
- Ten to fifteen minutes a day is better than one long session.
Teacher package
1–5. Objectives, prerequisites, materials, preparation, duration
Lesson objectives. Learners will: define structure; sort natural and man-made structures; name parts of a structure; describe loads.
Prerequisite knowledge. Grade 3 ideas: forces as pushes and pulls, materials and their properties, and engineering design basics.
Materials. Notebook, pencil. Low-resource options: use chalk or charcoal on a board or wall, drawings in the sand, and objects from the classroom instead of printed materials.
Preparation. Plan a safe walk.
Suggested duration. 45–60 minutes. It can be split into two shorter sessions.
6–9. Teaching procedure, explanation notes, guided and independent activities
Introduction (5 min). Show a stool and ask, “What does it carry?”
Explanation (10 min). Teach structures.
Guided activity (10 min). Learners hunt.
Independent activity (10 min). Learners sort.
Assessment and reflection (5 min). Ask each learner to say one thing they learned and how they know it.
Key questions. What is the load? Where is the base?
Teacher explanation notes. Start with real objects and safe, hands-on observation. Then talk about what was seen, then draw and write. Always say “how do you know?”. Keep to the safety notes, and use local, safe materials.
10–12. Differentiation, formative assessment, common misconceptions
Support. Use real objects and pictures, short sentences and a partner. Let learners point, show or draw instead of writing. Extension. Ask learners to find a new example at home and explain how they know.
Formative assessment. Listen to learners read and explain, ask “how do you know?”, and check the independent work.
Misconceptions. “Only buildings are structures.” Many things are.
13–15. Assessment questions, answer keys, marking scheme
Use the quiz, the 10-mark exam practice and the worksheet on this page. All answers and marking guides are in the answer sections above. Re-check every answer before use.
16–19. Remediation, enrichment, homework, teacher reflection
Remediation. Classify structures. Enrichment. Look for one new example near your home or school, draw it and explain it to someone. Homework. See above.
Teacher reflection. After teaching, record: which ideas learners understood; which misconceptions occurred; which activities worked; which learners need more practice; and what to improve next time.
Sources and standards
This lesson is based on the sources below, and no official endorsement is claimed. Reference starting points: Next Generation Science Standards, Cambridge Primary Science and the IB Primary Years Programme. Where a standard code is named, it points to the official framework.
Research used to shape this lesson. Courseversity Science curriculum, Grade 4 Unit 10, topic 1; Next Generation Science Standards, engineering design; Cambridge Primary Science Stage 4, physics: forces and structures; IB Primary Years Programme, how we organise ourselves and how the world works. These sources informed the lesson.