Computer Science
Kindergarten
20 min
Fast and Slow: Comparing Speed
Comparing the speed of two moving objects.
Tutorial Preview
1
Introduction & Learning Objectives
Learning Objectives
Point to the faster of two objects.
Point to the slower of two objects.
Say the word 'fast' for a quick object.
Say the word 'slow' for a slow object.
Sort two pictures by speed.
Follow a 2-step instruction about speed.
Who wins a race? A turtle 🐢 or a bunny 🐇? Let's find out!
Today, we will learn about fast and slow. We will see what moves quickly. This helps us tell computers what to do first!
Real-World Applications
Watching a fast race car 🏎️
Seeing a slow snail 🐌 crawl
Playing tag with friends 🏃♀️
Waiting for a game to load on a tablet 💻
2
Key Concepts & Vocabulary
TermDefinitionExample
Fast 💨Something that moves very quickly.A cheetah running is very fast.
Slow 🐌Something that does not move quickly.A turtle walking is very slow.
Compare 👀To look at two things. See how they are different.Let's compare a red block and a blue block.
SpeedHow fast or slow something moves.A rocket has a very high speed.
First 🥇The one that gets to the end before anyone else.The first person in line gets a snack.
Last 꼴찌The one that gets to the end after everyone else.The last person to finish the race.
3
Core Syntax & Patterns
The Race Rule
If it finishes first, it is faster.
When you watch a race, look for the winner. The winner is the fastest!
The Same Time Rule
If two things move for the same time, the one that goes farther is faster.
Imagine a 10-second timer. See who goes the farthest. That one is faster.
4 more steps in this tutorial
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Challenging
A fast printer and a slow printer are both given one piece of paper to print. Which sentence is true?
A.The slow printer will finish first.
B.The fast printer will use less time.
C.They will both use the same amount of time.
D.The slow printer will use less ink.
Challenging
A fast race car and a slow turtle travel for 10 seconds. Which one will go a SHORTER distance?
A.The slow turtle
B.The fast race car
C.They will go the same distance
D.The car will run out of gas
Challenging
Sometimes, being SLOW is better than being fast. In which of these is it better to be SLOW and careful?
A.Winning a running race
B.Running away from a bee
C.Putting away your toys quickly
D.Building a tall tower of blocks
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