The Rule of Threes
- 1Print it first. Read it once together and talk it through.
- 2Exercises on paper, then correct together with the answer key.
- 3Next day: a 10-minute review here on screen saves progress.
What you will learn
- 1Name the four parts of the Rule of Threes
- 2Explain why the Rule of Threes is a rough memory guide, not exact science
- 3Sort survival needs into air, shelter, water and food
- 4Put survival priorities in a sensible order for a real situation
Mini Lesson
When things go wrong in the wild, it is hard to know what to do first. Survivors use a simple memory guide called the Rule of Threes. It reminds you which needs come first, so you spend your energy on the right job. The times in the rule are only an estimate - real times change a lot with the weather, your health and what you do. Think of it as a priority list, not a clock.
🌿 The Wild Way (put first things first)
- AIR - ABOUT 3 MINUTES: you need to breathe all the time, so smoke or a blocked airway is always the first danger to deal with.
- SHELTER - ABOUT 3 HOURS: in harsh weather, like cold rain, strong wind or hot sun, your body can get into trouble in a few hours without cover.
- WATER - ABOUT 3 DAYS: your body loses water all day. In heat or hard work, you need water much sooner.
- FOOD - ABOUT 3 WEEKS: food matters least in a short emergency. You can go a long time without it, so never take a risk to get food.
- ROUGH, NOT EXACT: these numbers are a memory hook. A hot day, wet clothes or an injury can make the real time much shorter.
🌿 The Wild Way (use it with your grown-up)
- STAY CALM FIRST: before the Rule of Threes, remember S.T.O.P. - stop, think, observe, plan.
- STAY FOUND: stay with your group and your grown-up, and help make it easy for rescuers to find you.
- CHECK THE WEATHER: a cold, wet or very hot day moves shelter to the top of the list.
- SAVE YOUR ENERGY: rushing around looking for food wastes the energy you need for shelter and water.
- ASK THE QUESTION: "What will hurt us soonest?" Fix that first, then move down the list.
The Rule of Threes is a guide for setting priorities, not a test of how long you can go without something. Never try to go without water, food or shelter to "see what happens". In the wild you always stay with your grown-up, and the grown-up makes the big decisions.
Words to know
priority
The thing that matters most and should be done first.
e.g. In a cold storm, shelter is our top priority.
shelter
Something that protects you from rain, wind, cold or sun.
e.g. We sat under the tarp shelter until the rain stopped.
harsh
Very hard on the body, like freezing wind or burning sun.
e.g. Harsh weather makes shelter more urgent.
urgent
Needing to be dealt with right away.
e.g. Getting away from smoke is urgent.
estimate
A rough guess, not an exact number.
e.g. Three days without water is only an estimate.
energy
The strength your body has to move, work and stay warm.
e.g. Save your energy for the jobs that matter.
🧠 Survivor’s Trick: count the threes on your fingers - minutes, hours, days, weeks. The units get longer as the need gets less urgent, so the order is easy to remember.
Guided Practice
Exercises
Sort each situation into the need it is about: air, shelter, water or food.
Air
Shelter
Water
Food
Your group is caught out in bad weather. Put these jobs in a sensible order of priority.
Pick the best answer for each question.
1. What is the Rule of Threes?
2. Which need comes first in the Rule of Threes?
3. About how long can a person go without shelter in harsh weather?
4. Why can the real times be shorter than the rule says?
5. It is cold, windy and starting to rain. Your water bottle is half full. What comes first?
6. Why should you never take a risk just to get food?
7. Who makes the big decisions when your group is in trouble in the wild?
8. What is a good question to ask when deciding what to do first?
Parent Checklist
For the parent: after correcting together, check off what your child has really understood