The germs that make you sick were never big enough to see, so your eyes cannot tell you when your hands are clean — which is the whole reason the rule is twenty seconds and not “until they look right”. Twenty-four cards, a quiz in three tiers and four workshop activities cover the five steps, the spots people miss, the times that matter most, and what soap actually does that sanitizer does not.
Here is a hand. It looks clean. Nothing on it is big enough to see, so your eyes tell you it is fine.
This is the whole reason handwashing has a time on it. If dirt were the problem, you could stop when your hands looked clean — and most people do, in about six seconds. But the thing you are washing off was never visible, so your eyes cannot tell you when you are finished. Twenty seconds of soap and rubbing, then rinse under running water. The five times that matter most: before you eat, after the bathroom, after you touch an animal, after you cough or sneeze into your hand, and after you come inside. Nobody cooks in this curriculum until this is automatic.
Two things people get wrong
⚠️People often think…
You are done washing when your hands look clean.
Looking clean and being clean are two different things, and only one of them you can see. Mud washes off in two seconds; the germs that make you sick were never visible in the first place, so there is nothing to watch disappear. That is exactly why the rule is a length of time and not a look. Twenty seconds, every time, whether your hands were muddy or not.
Your eyes cannot tell you when you are done. The clock can.
⚠️People often think…
Hand sanitizer is the same as washing, so you can use it instead.
Sanitizer kills a lot of germs, and it is genuinely useful when there is no sink — on a bus, at a park, in the middle of a shop. But it kills them where they are; it does not take anything away. Soap and running water lift the germs off and carry them down the drain, along with the dirt and grease they are hiding in. So sanitizer is the spare, not the swap. If there is a sink, use the sink.
Sanitizer kills. Soap and water remove. If there is a sink, use it.
Wash your hands properly
1Watch one
You have just come in from the playground and lunch is on the table.
Wet your hands first. Soap on dry hands mostly just sits there.
Soap, and then rub — palms, backs, between the fingers, around the thumbs, under the nails.
Keep rubbing for twenty seconds. Sing Happy Birthday twice, or count slowly.
Rinse under running water, not in a bowl. The water has to carry them away.
Dry on a clean towel. ✓ Wet, soap, rub twenty, rinse, dry. Five steps, in that order, every time.
2Do one with me
Fill in the three boxes.
How many seconds of rubbing?
What comes FIRST — soap, or water?
Name one spot people miss
💬One sentence, then you move on
Why does the rule give you a number of seconds instead of saying “until they look clean”?
3Try one
You stroked a dog at the park. There is no sink anywhere. What do you use, and what do you do when you get home?
I want a hint first
One of the two kills germs and one of the two removes them. You want both, in that order.
💬Last one — then you’re done here
Washing your hands protects you. Name one person it protects who is not you.
Where this goes
Where this lives
Every meal, every classroom, every kitchen you will ever stand in. It is the one habit that keeps more people from getting sick than anything else anybody has ever invented, and it costs twenty seconds.
What this feeds
Next room: hot, cold and sharp — the things in a kitchen that can hurt you, and what to do about each one. Clean hands first, then a safe room.
Count the times you washed your hands today, and write down one time you should have and did not.
One card at a time — tap “Show me” to check yourself, then Next. Start at Foundation; when those feel easy, climb.
Helpful Hints
🧭 The unit in one line
Germs are too small to see → so your eyes cannot tell you when your hands are clean → which is why the rule is twenty seconds, not a look → wet, soap, rub twenty, rinse under running water, dry on something clean → and the five times that matter most are before you eat, after the bathroom, after an animal, after a cough, and when you come inside.
Your eyes cannot tell you. Count to twenty.
🔑 The one idea
Nearly every rule you are given comes with a way of checking it yourself. This one does not, and that is the whole difficulty. You cannot see the thing you are washing off, so you cannot watch it go, so there is no moment where your eyes say "done". That is not a small inconvenience — it is the reason people who genuinely mean to wash properly stop at six seconds and feel finished. The clock is standing in for a sense you do not have.
⚠️ Traps to avoid
Clean-looking is not clean. The thing that makes you ill was never visible, so there is nothing to watch disappear.
Sanitizer is the spare, not the swap. It KILLS germs where they are; soap and water REMOVE them. If there is a sink, use the sink.
Hot water does not kill germs on skin — it would have to burn you first. Warm or cold, and the TIME is what matters.
Rinse under RUNNING water. A bowl holds everything you just loosened and gives some of it back.
Turning the tap off with a clean hand picks up what you left on it. Use the towel or your elbow.
Drying is part of washing, and a dirty towel undoes the whole thing.
Clean is not a state you arrive at. Touching a phone, a handle or a bin puts you back at the start.
📐 The step, the reason, the mistake
Step
Why it is there
The common mistake
Fix
['1 · wet', '1 · mojar']
['soap needs water to spread', 'el jabón necesita agua para esparcirse']
['soap on dry hands', 'jabón en manos secas']
water first
['2 · soap', '2 · jabón']
['it grabs the grease germs hide in', 'agarra la grasa donde se esconden']
['not enough of it', 'muy poco']
a full pump
['3 · rub 20s', '3 · frotar 20s']
['this is the step that works', 'este es el paso que funciona']
['stopping at six seconds', 'parar a los seis segundos']
sing it twice
['4 · rinse', '4 · enjuagar']
['running water carries them off', 'el agua que corre se los lleva']
['a bowl of still water', 'un recipiente de agua quieta']
under the tap
['5 · dry', '5 · secar']
['wet hands pick things up', 'las manos mojadas recogen cosas']
['a dirty towel, or your trousers', 'una toalla sucia, o el pantalón']
something clean
['the tap', 'la llave']
['you opened it with dirty hands', 'la abriste con las manos sucias']
['closing it with a clean hand', 'cerrarla con la mano limpia']
towel or elbow
['no sink?', '¿sin lavabo?']
['sanitizer kills where they are', 'el gel mata donde están']
['using it instead of a sink', 'usarlo en vez del lavabo']
wash when you can
🎯 How you will be asked
“How long, and how do you know when you have done it?”
“Put the five steps in order.” — and say why each one goes where it does.
“Name the five times that matter most.”
“Soap or sanitizer?” — with a situation given, and a sink or no sink.
“Which spots did you miss?” — after the glitter test.
✅ Before the test, can you…
Say the five steps in order, without looking?
Count twenty seconds reliably — with a song, not a guess?
Name the four spots people miss and actually wash them?
Name the five times that matter most?
Explain to somebody younger why soap and sanitizer are not the same thing?
📚 Go to the sources
These open another website and need the internet. The first one has the twenty-second rule and the five times straight from the people who study it; the second is where the glitter test comes from, if a teacher wants to run it with a class.
Look back at anything you missed — the hint that appeared is exactly what to reread tonight.
How sure did you feel?
Workshop
Put the five steps back in the only order that works, sort twelve moments of a day into wash-now and carry-on, label the four spots almost everybody misses, and then argue for a rule you count rather than a rule you can see.
Your practice never leaves this device. There is no account and no sign-in. Your work is saved in this browser only, and you can erase it whenever you want.
Your practice record — saved on this device
This is your record of the module on screen — it stays here and goes nowhere. Independent means you got it right on the first tap; supported means you got it after the explain-and-retry, or marked ‘I had it’ on a revealed answer. Both count, and neither is a grade. If your teacher asks, copy the row or show them this screen.
Date
—
Topic
—
Level
—
Independent
0 of 0
Supported
0 of 0
Hints used
0
Cards studied
0
Lab
—
Traps met
0
Explained in own words
0
Confidence
—
The answer key is for a teacher: it prints only from here, for the unit on screen. Print the study packet prints the study pages and a blank quiz — never the answers.