Computer Science
Grade 1
20 min
If You Clean Up, Then...
Understanding the consequence of cleaning up (a tidy space).
What you'll learn
- Identify two places where toys belong after playing.
- Explain what happens after toys are cleaned up (e.g., the room looks nice).
- Apply the 'If...Then...' rule by completing the sentence: "If I clean up my blocks, then..."
Tutorial Preview
1
Introduction & Learning Objectives
Learning Objectives
Identify the 'if' part (condition) in a simple rule.
Identify the 'then' part (action) in a simple rule.
Explain that an 'if...then...' statement connects a condition to an action.
Follow a one-step 'if...then...' instruction to complete a task.
Create their own simple 'if...then...' rule using familiar objects.
Predict the outcome of a simple 'if...then...' scenario.
What happens IF it starts raining outside? 🌧️ THEN you get your umbrella! ☂️
We are going to learn about special rules called 'If...Then...' rules. These rules help us, and computers, make smart choices. They tell us what to do next!
Real-World Applications
If the light is red, then we stop.
If you are hungry, then...
2
Key Concepts & Vocabulary
TermDefinitionExample
If...Then... RuleA special rule that tells you what to do. It has two parts.IF you see a green block, THEN stack it on the tower.
Condition (The 'If' Part)The first part of the rule. It's a question that is either true or not true.In the rule 'IF the banana is yellow...', the condition is 'the banana is yellow'.
Action (The 'Then' Part)The second part of the rule. It's the job you do if the 'if' part is true.In the rule '...THEN eat it', the action is 'eat it'.
TrueWhen the 'if' part is happening right now. It means 'yes'. 👍The light IS red. So, 'if the light is red' is true.
Not True (False)When the 'if' part is not happening. It means 'no�...
3
Core Syntax & Patterns
The If...Then... Pattern
IF [a condition is true], THEN [do an action].
Use this pattern to make a decision. First, check the 'if' part. If it's true, do the 'then' part.
The Do Nothing Pattern
IF [a condition is not true], THEN [do nothing].
If the 'if' part is not true, you just wait. You do not do the action.
4 more steps in this tutorial
Sign up free to access the complete tutorial with worked examples and practice.
Sign Up Free to ContinueSample Practice Questions
Challenging
Mom's rule: 'If you put away your cars AND your blocks, then we can bake cookies 🍪.' You only put away the cars. Can you bake cookies yet?
A.Yes, because you put away the cars
B.Yes, because you cleaned up something
C.No, you still need to put away the blocks
D.No, because it's too late to bake
Challenging
The rule is: 'If you press the green button, then the toy robot sings.' You press the green button, but the robot does nothing. What is the MOST likely problem?
A.You pressed the wrong button
B.The robot doesn't like the song
C.The rule is wrong
D.The robot's batteries might be dead
Challenging
Your room is messy. You want to earn time to play a video game. Which is the BEST 'If...Then...' rule to ask your parents for?
A.If I play a video game, then I will clean my room.
B.If I clean my whole room, then can I play a video game for 30 minutes?
C.If my room is messy, then I can play a video game.
D.If I can play a video game, then my room is clean.
Want to practice and check your answers?
Sign up to access all questions with instant feedback, explanations, and progress tracking.
Start Practicing FreeMore from If...Then...: Simple Conditional Statements
Computer Science for other grades
Frequently asked questions
What grade level is "If You Clean Up, Then..."?
If You Clean Up, Then... is a Grade 1 Computer Science lesson on ExcelOS.
What will I learn in If You Clean Up, Then...?
You'll be able to: Identify two places where toys belong after playing; Explain what happens after toys are cleaned up (e.g., the room looks nice); Apply the 'If...Then...' rule by completing the sentence: "If I clean up my blocks, then...".
Is "If You Clean Up, Then..." free to practice?
Yes. You can read the tutorial preview for free, and signing up for a free ExcelOS account unlocks the full tutorial and all practice questions with instant feedback.
How many practice questions are included with If You Clean Up, Then...?
This lesson includes 27 practice questions across multiple difficulty levels, each with instant feedback and explanations.