You will learn
- Define tissue and organ.
- Order the levels.
- Give examples.
- Explain how parts work together.
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
- Cells form tissues.
- Tissues form organs.
- Organs form systems.
- Systems form organisms.
Words to know
a group of similar cells doing the same job
a group of tissues working together
organs working together
a step from cell to organism
1. Discover: The beating heart
Ms Ntim presses a stethoscope toy to a heart model. “The heart is an organ made of muscle tissue, blood vessel tissue and nerve tissue,” she says. “Each tissue is made of cells. The heart works with vessels and blood in a system.”
Think: How many levels did she name?
2. Understand: Levels
Idea 1: Tissues
A tissue is a group of similar cells doing the same job, such as muscle tissue, which contracts.
Idea 2: Organs
An organ is made of several tissues working together. The heart has muscle, blood vessel and nerve tissue. In plants, a leaf is an organ.
Idea 3: Systems
An organ system is a group of organs with a shared job: the digestive system, the circulatory system, the shoot system in plants.
3. Worked examples
Example 1 (I show you): Order
Levels.
- Cell.
- Organ.
- System.
Answer: Cell, tissue, organ, system, organism.
Example 2 (We do it together): Give
Examples.
- Muscle tissue.
- Heart.
- Circulatory system.
Answer: One per level.
Example 3 (You try): Explain
Teamwork.
Show the steps and answer
- Tissues.
- Organs.
- System.
Answer: Parts work together.
Did you know?
The human skin is the largest organ, made of several tissues.
Why this matters
Levels of organisation show how bodies are built.
4. Explore: Build the levels
Use coloured counters or cards to model cells, then group them into tissues, organs and a system, and label each level.
- Choose a system.
- Make cell cards.
- Group into tissue.
- Group into organ.
Think about it: what did you notice?
What did you notice? Each level added a new job.
5. Practise
Say it in a sentence
Use these starters when you talk about the lesson. Say them out loud.
- A ___ is a group of similar cells.
- An ___ is a group of tissues.
- An organ ___ is organs working together.
- A ___ of organisation is a step in a body.
Guided practice
Question 1. What is a tissue?
Similar cells.
Question 2. What is an organ?
Tissues together.
Question 3. What is a system?
Organs together.
Independent practice
Level 1: Start
- What is a tissue?
- What is an organ?
- What is a system?
- Name an organ.
- Name a system.
Level 2: Grow
- Why levels?
- Why teamwork?
- Why systems?
Level 3: Stretch
- Build the levels.
- Give examples.
- Explain.
Answers are in the answer key below. Try first, then check.
6. Apply: Science in everyday life
Explain how cells, tissues and organs are linked.
Show a sample answer
Use the heart.
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 tissues.
Fix: Plants too.
8. Lesson summary and revision card
- I can define tissue and organ.
- I can order the levels.
- I can give examples.
- I can explain how parts work together.
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
- Cells form tissues.
- Tissues form organs.
- Organs form systems.
- Systems form organisms.
11. Next lesson
Next lesson: Organisation of living systems. 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 tissue and organ. [2 marks]
- Order five levels of organisation. [3 marks]
- Explain the heart as an organ. [3 marks]
- Safety rule. [2 marks]
Total: 10 marks.
Marking guide and model answers
- 1 each
- Cell [1]; tissue and organ [1]; system and organism [1]
- Muscle tissue [1]; other tissues [1]; works together [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 tissue?
- What is an organ?
- What is a system?
- Name an organ.
- Name a system.
- Why levels?
- Why teamwork?
- Why systems?
- Build the levels.
- Give examples.
Homework
Draw the levels of organisation for the circulatory system.
Answer key and marking scheme
| Question | Expected response | Marks |
|---|---|---|
| 1. What is a tissue? | Similar cells. | 1 |
| 2. What is an organ? | Tissues together. | 1 |
| 3. What is a system? | Organs together. | 1 |
| 4. Name an organ. | Heart. | 1 |
| 5. Name a system. | Digestive. | 1 |
| 6. Why levels? | Organise. | 1 |
| 7. Why teamwork? | Bigger jobs. | 1 |
| 8. Why systems? | Complex tasks. | 1 |
| 9. Build the levels. | Chart. | 1 |
| 10. Give examples. | List. | 1 |
| Total | 10 |
Independent practice answers. Level 1: 1 Similar cells.; 2 Tissues together.; 3 Organs together.; 4 Heart.; 5 Digestive.. Level 2: 1 Organise.; 2 Bigger jobs.; 3 Complex tasks.. Level 3: 1 Chart.; 2 List.; 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 tissue and organ | 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 Order the levels | 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 Give examples | 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 how parts work together | 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: “An organ is a single cell.” Many tissues.
- Explain another way: use real objects, pictures or actions first, then words.
- Show a simpler example: Order the levels of organisation.
- 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 tissues and organs. You do not need to be an expert to help.
- Feel your pulse.
- Ask “What is the heart made of?”
- Use models.
- 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 tissue and organ; order the levels; give examples; explain how parts work together.
Prerequisite knowledge. Grade 5 ideas: living things, plant and animal parts and using a hand lens.
Materials. Cards, counters. 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. Print cards.
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 heart model and ask, “What is it made of?”
Explanation (10 min). Teach levels.
Guided activity (10 min). Learners model.
Independent activity (10 min). Learners explain.
Assessment and reflection (5 min). Ask each learner to say one thing they learned and how they know it.
Key questions. Which level? What is it made of?
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. “An organ is a single cell.” Many tissues.
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. Order the levels of organisation. 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 3, topic 9; Next Generation Science Standards, structure and function; Cambridge Lower Secondary Science, cells and organisation; IB Primary Years Programme, who we are. These sources informed the lesson.