You will learn
- Make a rain gauge.
- Read it in mm.
- Record rainfall.
- Compare days or weeks.
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
- A rain gauge collects rain.
- We read depth in millimetres.
- We place it in an open place.
- We add daily amounts to find totals.
Words to know
the amount of rain that falls
a tool that collects and measures rain
a unit of length used for rainfall
the sum of amounts
1. Discover: The bottle gauge
Naa cuts the top off a clear plastic bottle, turns it into a funnel and puts a ruler scale on the side. After the storm she reads 14 mm. “That much rain fell in one night,” she says.
Think: Why place it in the open?
2. Understand: Rainfall
Idea 1: Rain gauge
A rain gauge is a container with a scale that collects rain. We read how deep the water is in millimetres (mm).
Idea 2: Setting up
Place the gauge in an open place away from trees and roofs, on level ground, and empty it after each reading.
Idea 3: Totals
Add daily amounts to find weekly or monthly totals. Rainfall helps farmers and water planners.
3. Worked examples
Example 1 (I show you): Read
Water at 6.
- 6 mm.
- Read scale.
- Record.
Answer: The rainfall is 6 mm.
Example 2 (We do it together): Place
Open space.
- No trees.
- Level.
- Fair.
Answer: Place the gauge in the open.
Example 3 (You try): Total
2 + 5 + 3.
Show the steps and answer
- Add.
- 10.
- mm.
Answer: The total is 10 mm.
Did you know?
Some places in India receive over 11,000 mm of rain a year.
Why this matters
Rainfall records help plan farming, water supply and flood warnings.
4. Explore: Make a rain gauge
Build and use a rain gauge.
- Cut a clear bottle.
- Invert the top as a funnel.
- Add a ruler scale.
- Place outside and record daily.
Think about it: what did you notice?
What did you notice? Rain amounts varied from day to day.
5. Practise
Say it in a sentence
Use these starters when you talk about the lesson. Say them out loud.
- A ___ gauge measures rain.
- Rainfall is in ___.
- Place it in the ___.
- Add amounts to get a ___.
Guided practice
Question 1. What measures rain?
Rain gauge.
Question 2. What unit?
mm.
Question 3. Where to place?
Open.
Independent practice
Level 1: Start
- What measures rain?
- What unit?
- Where to place?
- How to find total?
- Why record?
Level 2: Grow
- Why away from trees?
- Why level?
- Why empty?
Level 3: Stretch
- Build the gauge.
- Record a week.
- Find total rainfall.
Answers are in the answer key below. Try first, then check.
6. Apply: Science in everyday life
When is it rainy where you live?
Show a sample answer
Wet season.
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: mm.
Fix: Open.
8. Lesson summary and revision card
- I can make a rain gauge.
- I can read it in mm.
- I can record rainfall.
- I can compare days or weeks.
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
- A rain gauge collects rain.
- We read depth in millimetres.
- We place it in an open place.
- We add daily amounts to find totals.
11. Next lesson
Next lesson: Wind direction. 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.
- Describe how to make a rain gauge. [3 marks]
- Where to place it and why? [2 marks]
- Add 3 + 6 + 2 + 0 + 4. [2 marks]
- Why record rainfall? [2 marks]
- Safety rule? [1 mark]
Total: 10 marks.
Marking guide and model answers
- Cut bottle [1]; funnel [1]; scale [1]
- Open [1]; accurate [1]
- Method [1]; 15 mm [1]
- Farming [1]; water planning [1]
- Any [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 measures rain?
- What unit?
- Where to place?
- How to find total?
- Why record?
- Why away from trees?
- Why level?
- Why empty?
- Build the gauge.
- Record a week.
Homework
Make a rain gauge with an adult and record rain for a week.
Answer key and marking scheme
| Question | Expected response | Marks |
|---|---|---|
| 1. What measures rain? | Rain gauge. | 1 |
| 2. What unit? | mm. | 1 |
| 3. Where to place? | Open. | 1 |
| 4. How to find total? | Add. | 1 |
| 5. Why record? | Plan. | 1 |
| 6. Why away from trees? | No dripping. | 1 |
| 7. Why level? | Accurate. | 1 |
| 8. Why empty? | Fresh reading. | 1 |
| 9. Build the gauge. | Gauge. | 1 |
| 10. Record a week. | Table. | 1 |
| Total | 10 |
Independent practice answers. Level 1: 1 Rain gauge.; 2 mm.; 3 Open.; 4 Add.; 5 Plan.. Level 2: 1 No dripping.; 2 Accurate.; 3 Fresh reading.. Level 3: 1 Gauge.; 2 Table.; 3 Sum..
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 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 |
| O2 Read it in mm | 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 Record 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 days or weeks | 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: “Rainfall is measured in kilograms.” mm.
- Explain another way: use real objects, pictures or actions first, then words.
- Show a simpler example: Build and read a rain gauge.
- 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 builds a rain gauge. You do not need to be an expert to help.
- Set up the gauge together.
- Ask, “How many mm?”
- Stay in during storms.
- 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: make a rain gauge; read it in mm; record rainfall; compare days or weeks.
Prerequisite knowledge. Grade 2 weather ideas: describing weather, the seasons, and how weather affects daily life.
Materials. Clear bottles, rulers, tape, scissors (adult use). 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. Cut bottles.
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). Ask, “How can we measure rain?”
Explanation (10 min). Teach rainfall.
Guided activity (10 min). Learners build 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 fell? How do you know?
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. “Rainfall is measured in kilograms.” mm.
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. Build and read a rain gauge. 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 3 Unit 8, topic 3; Next Generation Science Standards, weather and climate; Cambridge Primary Science Stage 3, Earth and space; IB Primary Years Programme, how the world works. These sources informed the lesson.