You will learn
- Say what rainfall is.
- Make a rain gauge.
- Measure rainfall.
- Compare rainy and dry days.
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
- Rain falls from clouds.
- A rain gauge measures rainfall.
- Rainfall is measured in millimetres.
- Rainy seasons bring more rain.
Words to know
how much rain falls
a tool that collects rain to measure it
a small unit of length, written mm
light rain
1. Discover: The rain gauge
After a storm, Efua checks the school rain gauge. The water has reached the 12 mm line. “That was a lot of rain,” she says. The day before, only 2 mm fell. “That was drizzle,” says her teacher.
Think: Which day had more rain?
2. Understand: Rain
Idea 1: Where rain comes from
Rain forms when water droplets in clouds join and become heavy. They fall as rain. Light rain is called drizzle.
Idea 2: Rain gauge
A rain gauge is a straight-sided container with marks. Rain collects in it and we read the level in millimetres (mm).
Idea 3: Rainy and dry seasons
Many places have a rainy season with lots of rain and a dry season with little. Farmers use this pattern to know when to plant.
3. Worked examples
Example 1 (I show you): Compare
12 mm and 2 mm.
- 12 > 2.
- Difference 10.
- More rain.
Answer: 12 mm is more rain.
Example 2 (We do it together): Gauge
Collect rain.
- Straight-sided.
- Marks.
- Read level.
Answer: A rain gauge collects and measures.
Example 3 (You try): Season
Dry vs rainy.
Show the steps and answer
- Dry: little rain.
- Rainy: lots.
- Planting time.
Answer: Seasons affect planting.
Did you know?
Mawsynram in India receives about 11,800 mm of rain in a year, among the highest in the world.
Why this matters
Rainfall measurements help farmers, water planners and builders.
4. Explore: Rain gauge
Make a rain gauge from a clear plastic bottle and measure rainfall.
- An adult cuts the bottle.
- Mark mm lines with a ruler.
- Place in an open spot.
- Read after rain.
Think about it: what did you notice?
What did you notice? Different days gave different amounts.
5. Practise
Say it in a sentence
Use these starters when you talk about the lesson. Say them out loud.
- Rain falls from ___.
- A rain ___ collects rain.
- We measure in ___.
- Light rain is ___.
Guided practice
Question 1. Where does rain fall from?
Clouds.
Question 2. What is a rain gauge?
A tool that collects rain.
Question 3. What unit?
Millimetres.
Independent practice
Level 1: Start
- Where does rain fall from?
- What is a rain gauge?
- What unit?
- What is drizzle?
- What is a season?
Level 2: Grow
- Why a straight-sided container?
- Why open spot?
- Which is more, 12 mm or 2 mm?
Level 3: Stretch
- Make a rain gauge.
- Record a week’s rainfall.
- Graph rainfall.
Answers are in the answer key below. Try first, then check.
6. Apply: Science in everyday life
When is the rainy season?
Show a sample answer
Usually April to October.
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: Some falls in the dry season.
Fix: It measures rain.
8. Lesson summary and revision card
- I can say what rainfall is.
- I can make a rain gauge.
- I can measure rainfall.
- I can compare rainy and dry days.
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
- Rain falls from clouds.
- A rain gauge measures rainfall.
- Rainfall is measured in millimetres.
- Rainy seasons bring more rain.
11. Next lesson
Next lesson: Wind. 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.
- What is rainfall? [1 mark]
- What does a rain gauge do? [2 marks]
- Compare 8 mm and 3 mm. [2 marks]
- Describe making a gauge. [3 marks]
- Safety rule? [1 mark]
Total: 9 marks.
Marking guide and model answers
- How much rain falls [1]
- Collects rain [1]; measures [1]
- 8 more [1]; difference 5 [1]
- Clear bottle [1]; mm marks [1]; open place [1]
- Stay inside in storms [1]
Score guide: 8 to 9 = secure. 6 to 7 = nearly there, revise the parts you missed. Under 6 = work through the lesson again with a grown-up.
Printable worksheet
- Where does rain fall from?
- What is a rain gauge?
- What unit?
- What is drizzle?
- What is a season?
- Why a straight-sided container?
- Why open spot?
- Which is more, 12 mm or 2 mm?
- Make a rain gauge.
- Record a week’s rainfall.
Homework
Make a rain gauge. Measure rainfall each day for a week.
Answer key and marking scheme
| Question | Expected response | Marks |
|---|---|---|
| 1. Where does rain fall from? | Clouds. | 1 |
| 2. What is a rain gauge? | A tool that collects rain. | 1 |
| 3. What unit? | Millimetres. | 1 |
| 4. What is drizzle? | Light rain. | 1 |
| 5. What is a season? | A time of year. | 1 |
| 6. Why a straight-sided container? | Even measure. | 1 |
| 7. Why open spot? | Catch rain. | 1 |
| 8. Which is more, 12 mm or 2 mm? | 12 mm. | 1 |
| 9. Make a rain gauge. | Gauge. | 1 |
| 10. Record a week’s rainfall. | Table. | 1 |
| Total | 10 |
Independent practice answers. Level 1: 1 Clouds.; 2 A tool that collects rain.; 3 Millimetres.; 4 Light rain.; 5 A time of year.. Level 2: 1 Even measure.; 2 Catch rain.; 3 12 mm.. Level 3: 1 Gauge.; 2 Table.; 3 Bar chart..
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 Say what rainfall is | 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 Make a rain gauge | 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 Measure rainfall | 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 Compare rainy and dry days | 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: “Rain only falls in the rainy season.” Some falls in the dry season.
- Explain another way: use real objects, pictures or actions first, then words.
- Show a simpler example: Make a gauge and compare rainfall.
- 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 makes a rain gauge. You do not need to be an expert to help.
- Check the gauge after rain.
- Ask, “How many mm?”
- Draw a chart.
- 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: say what rainfall is; make a rain gauge; measure rainfall; compare rainy and dry days.
Prerequisite knowledge. Grade 1 ideas: weather and the sky, describing weather and dressing for weather.
Materials. Clear bottles, rulers, markers, tape and tables. 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. Pre-cut bottle tops. Prepare tables.
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 picture of rain and ask, “How much?”
Explanation (10 min). Teach rainfall.
Guided activity (10 min). Learners make gauges.
Independent activity (10 min). Learners record.
Assessment and reflection (5 min). Ask each learner to say one thing they learned and how they know it.
Key questions. How much rain? Which day was wetter?
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. “Rain only falls in the rainy season.” Some falls in the dry season.
13–15. Assessment questions, answer keys, marking scheme
Use the quiz, the 9-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. Make a gauge and compare rainfall. 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 2 Unit 8, topic 3; Next Generation Science Standards, Earth systems and weather patterns (K-ESS2, 3-ESS2 foundations); Cambridge Primary Science Stage 2, Earth and atmosphere; IB Primary Years Programme, how the world works. These sources informed the lesson.