Computer Science
Grade 1
20 min
The Washing Machine: Cleaning Our Clothes
Learn about the technology that cleans clothes in a washing machine.
Tutorial Preview
1
Introduction & Learning Objectives
Learning Objectives
Identify the washing machine as a piece of technology.
Name the inputs for a washing machine (clothes, soap, water).
Name the output of a washing machine (clean clothes).
List the steps for washing clothes in the correct order (a simple algorithm).
Explain that machines follow steps to do a job.
How do our muddy socks 🧦 get super clean? A robot helper does it! ✨
We will learn about a cool machine: the washing machine! It's a computer that follows steps. Let's see how it works!
Real-World Applications
Washing our play clothes 👕
Cleaning our favorite teddy bear's blanket 🧸
Making our towels fluffy and fresh 🛁
Getting our sports jerseys ready for the next game ⚽
2
Key Concepts & Vocabulary
TermDefinitionExample
TechnologyA tool that humans make to help with a job. 🤖A washing machine is technology that helps us wash clothes.
InputWhat you put IN to a machine to start. 👉Dirty clothes 👕 and soap 🧼 are inputs for the washing machine.
OutputWhat comes OUT of a machine when it's done. 👈Clean, wet clothes ✨ are the output of the washing machine.
AlgorithmA list of steps to finish a job, like a recipe. 📝The washing machine's algorithm is: wash, rinse, and then spin.
SequencePutting steps in the right order: 1️⃣, 2️⃣, 3️⃣.First you put clothes in, THEN you add soap. That is a sequence.
3
Core Syntax & Patterns
The Input Rule
Input First, Then Start
You must put things IN the machine before you press the start button.
The Order Pattern (Algorithm)
1. Wash 🧼 --> 2. Rinse 💧 --> 3. Spin 🌪️
The machine always follows these three steps in the same order to get clothes clean.
4 more steps in this tutorial
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Challenging
Why is it a very important rule to ask a grown-up for help BEFORE using the washing machine?
A.Because grown-ups know the best songs to sing while washing
B.Because it uses electricity and water, which can be dangerous together
C.Because kids are not strong enough to press the buttons
D.Because the machine is very shy around children
Challenging
The washing machine is full, the soap is in, but it won't start. Following a debugging process, what is the FIRST thing a grown-up should check?
A.If the clothes are sorted correctly
B.If there is enough water in the house
C.If the door is clicked shut all the way
D.If the clothes are folded nicely inside
Challenging
You only have one tiny, dirty sock to wash. What is the smartest and most efficient plan?
A.Run the whole washing machine just for the one sock
B.Throw the sock away and get a new one
C.Wash the sock by hand in the sink
D.Wear the sock dirty
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