You will learn
- Order the phases.
- Explain why phases happen.
- Distinguish phases and eclipses.
- Link phases to the month.
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
Words to know
the shape of the lit part of the Moon we see
getting bigger
getting smaller
when one body blocks light falling on another
1. Discover: The Moon diary
Kwame draws the Moon each evening for two weeks. It grows from a thin curve to a full circle. “The Moon is not changing shape,” says Ms Danso. “We are seeing different amounts of its lit half.”
Think: Why does the Moon seem to change?
2. Understand: Phases
Idea 1: The cycle
As the Moon orbits Earth every 29.5 days we see different amounts of its lit half. The order is: new Moon, waxing crescent, first quarter, waxing gibbous, full Moon, waning gibbous, last quarter, waning crescent.
Idea 2: Why
The Sun always lights half of the Moon. At new Moon the lit half faces away from us; at full Moon it faces us. In between we see part of it: waxing (growing) then waning (shrinking).
Idea 3: Eclipses
An eclipse happens only when the Sun, Earth and Moon line up: a lunar eclipse when Earth’s shadow falls on the Moon, a solar eclipse when the Moon blocks the Sun (never view it directly).
3. Worked examples
Example 1 (I show you): Order
Phases.
- New.
- Quarter.
- Full.
Answer: Eight.
Example 2 (We do it together): Explain
Waxing.
- Growing.
- Right side lit (north).
- Before full.
Answer: Waxing.
Example 3 (You try): Distinguish
Eclipse.
Show the steps and answer
- Alignment.
- Shadow.
- Rare.
Answer: Not phases.
Did you know?
We always see the same side of the Moon because it rotates once in the same time it takes to orbit Earth.
Why this matters
Moon phases shaped the first calendars and still guide many festivals.
4. Explore: Ball and lamp
In a dark room, hold a white ball at arm’s length, turn slowly in a circle facing a battery lamp, and sketch the lit part you see at eight positions.
- Dim the room.
- Hold the ball.
- Turn slowly.
- Sketch.
Think about it: what did you notice?
What did you notice? Phases changed from thin to full and back.
5. Practise
Say it in a sentence
Use these starters when you talk about the lesson. Say them out loud.
- A ___ is the shape of the lit Moon we see.
- ___ means getting bigger.
- ___ means getting smaller.
- An ___ is when one body blocks light from another.
Guided practice
Question 1. How many phases?
Eight.
Question 2. Cycle length?
29.5 days.
Question 3. What lights the Moon?
The Sun.
Independent practice
Level 1: Start
- How many phases?
- Cycle length?
- What lights the Moon?
- Waxing?
- Waning?
Level 2: Grow
- Why phases?
- Why same face?
- Why eclipses rare?
Level 3: Stretch
- Model phases.
- Order cards.
- Explain.
Answers are in the answer key below. Try first, then check.
6. Apply: Science in everyday life
Explain why the Moon has phases.
Show a sample answer
Use the lit half.
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: Not.
Fix: Reflects.
8. Lesson summary and revision card
- I can order the phases.
- I can explain why phases happen.
- I can distinguish phases and eclipses.
- I can link phases to the month.
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
- The Moon shows eight main phases.
- The Sun always lights half of the Moon.
- The cycle takes about 29.5 days.
- Phases are not Earth’s shadow.
11. Next lesson
Next lesson: Space exploration. 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 phase and eclipse. [2 marks]
- Order four phases. [3 marks]
- Explain why phases happen. [3 marks]
- Safety rule. [2 marks]
Total: 10 marks.
Marking guide and model answers
- 1 each
- Any three correct [2]; order [1]
- Sun lights half [1]; Moon orbits [1]; view changes [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
- How many phases?
- Cycle length?
- What lights the Moon?
- Waxing?
- Waning?
- Why phases?
- Why same face?
- Why eclipses rare?
- Model phases.
- Order cards.
Homework
Draw the Moon each night for a week.
Answer key and marking scheme
| Question | Expected response | Marks |
|---|---|---|
| 1. How many phases? | Eight. | 1 |
| 2. Cycle length? | 29.5 days. | 1 |
| 3. What lights the Moon? | The Sun. | 1 |
| 4. Waxing? | Growing. | 1 |
| 5. Waning? | Shrinking. | 1 |
| 6. Why phases? | View of lit half. | 1 |
| 7. Why same face? | Synchronous rotation. | 1 |
| 8. Why eclipses rare? | Alignment. | 1 |
| 9. Model phases. | Sketches. | 1 |
| 10. Order cards. | Chart. | 1 |
| Total | 10 |
Independent practice answers. Level 1: 1 Eight.; 2 29.5 days.; 3 The Sun.; 4 Growing.; 5 Shrinking.. Level 2: 1 View of lit half.; 2 Synchronous rotation.; 3 Alignment.. Level 3: 1 Sketches.; 2 Chart.; 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 Order the phases | 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 Explain why phases happen | 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 Distinguish phases and eclipses | 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 Link phases to the month | 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: “Phases are Earth’s shadow.” Not.
- Explain another way: use real objects, pictures or actions first, then words.
- Show a simpler example: Explain Moon phases.
- 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 the phases of the Moon. You do not need to be an expert to help.
- Watch the Moon.
- Ask “What shape tonight?”
- Use a torch safely.
- 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: order the phases; explain why phases happen; distinguish phases and eclipses; link phases to the month.
Prerequisite knowledge. Grade 5 ideas: the Solar System, the Sun, Earth and Moon motions and models.
Materials. White ball, battery lamp, paper. 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. Darken the room.
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 two Moon photos and ask, “Why different?”
Explanation (10 min). Teach phases.
Guided activity (10 min). Learners model.
Independent activity (10 min). Learners sketch.
Assessment and reflection (5 min). Ask each learner to say one thing they learned and how they know it.
Key questions. Why does the Moon change shape?
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. “Phases are Earth’s shadow.” Not.
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. Explain Moon phases. 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 9, topic 9; Next Generation Science Standards, Earth’s place in the universe; Cambridge Lower Secondary Science, Earth and space; IB Primary Years Programme, where we are in place and time. These sources informed the lesson.