You will learn
- Sketch ideas.
- Label diagrams.
- Choose a concept.
- Explain model limits.
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
- Models help test ideas cheaply.
- Sketches and diagrams communicate ideas.
- Compare several concepts.
- All models have limits.
Words to know
a representation of a real thing
a quick drawing of an idea
an early design idea
the ratio between model and real size
1. Discover: The cardboard city
Before building a footbridge, engineers make a cardboard model. “A model finds mistakes before they cost real money,” says Ms Amoako. The class builds a 1:20 scale model of a ramp and finds the slope is too steep for wheelchairs.
Think: What would have happened without the model?
2. Understand: Modelling
Idea 1: Sketching
A sketch is a quick drawing to capture an idea. Labelled diagrams add sizes, materials and how parts connect. Draw at least three concepts before choosing one.
Idea 2: Physical models
A model can be a paper mock-up, a cardboard prototype or a computer drawing. A scale model uses a ratio such as 1:20, so 1 cm on the model equals 20 cm in real life.
Idea 3: Choosing
Score each concept against the criteria and constraints, then choose the best. Remember that a model can differ from the real thing in material, size and strength.
3. Worked examples
Example 1 (I show you): Scale
Convert.
- 1:20.
- 5 cm.
- 100 cm.
Answer: Multiply.
Example 2 (We do it together): Compare
Concepts.
- Three sketches.
- Criteria.
- Score.
Answer: Pick best.
Example 3 (You try): Limit
Model.
Show the steps and answer
- Material.
- Size.
- Strength.
Answer: Not identical.
Did you know?
Architects and aircraft designers test models in wind tunnels before building full-size versions.
Why this matters
Models save time, money and sometimes lives.
4. Explore: Three concepts
Sketch three concepts for your problem, label them, make a quick cardboard mock-up of the best and test it against two criteria.
- Sketch three.
- Label.
- Score.
- Make a mock-up.
Think about it: what did you notice?
What did you notice? The mock-up revealed a problem the sketch missed.
5. Practise
Say it in a sentence
Use these starters when you talk about the lesson. Say them out loud.
- A ___ represents a real thing.
- A ___ is a quick drawing.
- A ___ is an early design idea.
- ___ is the ratio of model to real size.
Guided practice
Question 1. What is a model?
Representation.
Question 2. A sketch?
Quick drawing.
Question 3. How many concepts?
Three.
Independent practice
Level 1: Start
- What is a model?
- A sketch?
- How many concepts?
- Scale 1:20?
- A limit?
Level 2: Grow
- Why models?
- Why three?
- Why label?
Level 3: Stretch
- Sketch.
- Score.
- Explain.
Answers are in the answer key below. Try first, then check.
6. Apply: Science in everyday life
Explain why engineers use models.
Show a sample answer
Give two reasons.
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: Limits.
Fix: Compare.
8. Lesson summary and revision card
- I can sketch ideas.
- I can label diagrams.
- I can choose a concept.
- I can explain model limits.
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
- Models help test ideas cheaply.
- Sketches and diagrams communicate ideas.
- Compare several concepts.
- All models have limits.
11. Next lesson
Next lesson: Building prototypes. 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 model and concept. [2 marks]
- Calculate a scale conversion. [3 marks]
- Explain two limits of a model. [3 marks]
- Safety rule. [2 marks]
Total: 10 marks.
Marking guide and model answers
- 1 each
- Method [1]; calculation [1]; unit [1]
- Two limits [2]; example [1]
- 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 model?
- A sketch?
- How many concepts?
- Scale 1:20?
- A limit?
- Why models?
- Why three?
- Why label?
- Sketch.
- Score.
Homework
Sketch three ideas for your problem.
Answer key and marking scheme
| Question | Expected response | Marks |
|---|---|---|
| 1. What is a model? | Representation. | 1 |
| 2. A sketch? | Quick drawing. | 1 |
| 3. How many concepts? | Three. | 1 |
| 4. Scale 1:20? | 1 cm is 20 cm. | 1 |
| 5. A limit? | Not identical. | 1 |
| 6. Why models? | Save cost. | 1 |
| 7. Why three? | Compare. | 1 |
| 8. Why label? | Clarity. | 1 |
| 9. Sketch. | Drawing. | 1 |
| 10. Score. | Table. | 1 |
| Total | 10 |
Independent practice answers. Level 1: 1 Representation.; 2 Quick drawing.; 3 Three.; 4 1 cm is 20 cm.; 5 Not identical.. Level 2: 1 Save cost.; 2 Compare.; 3 Clarity.. Level 3: 1 Drawing.; 2 Table.; 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 Sketch ideas | 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 Label diagrams | 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 Choose a concept | 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 Explain model limits | 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: “A model is exactly like the real thing.” Limits.
- Explain another way: use real objects, pictures or actions first, then words.
- Show a simpler example: Create and compare models.
- 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 sketches and models design ideas. You do not need to be an expert to help.
- Provide cardboard.
- Ask “What does this model show?”
- Supervise cutting.
- 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: sketch ideas; label diagrams; choose a concept; explain model limits.
Prerequisite knowledge. Grade 5 ideas: the engineering design process, testing and improving a solution.
Materials. Cardboard, safety scissors, glue sticks. 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. Cutting mats.
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 scale model and ask, “Why build small?”
Explanation (10 min). Teach modelling.
Guided activity (10 min). Learners sketch.
Independent activity (10 min). Learners build.
Assessment and reflection (5 min). Ask each learner to say one thing they learned and how they know it.
Key questions. Which concept works best? What are the limits?
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. “A model is exactly like the real thing.” Limits.
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. Create and compare models. 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 6 Unit 11, topic 5; Next Generation Science Standards, engineering design; Cambridge Lower Secondary Science, thinking and working scientifically; IB Primary Years Programme, how we organise ourselves. These sources informed the lesson.