Using Multiple Events and Conditions

Active learning works because students need to see how events and conditions interact in real time. When they test two inputs at once on a shared screen, their misconceptions about sequence and logic become visible immediately. This hands-on testing helps them move from abstract ideas to concrete understanding.

• Year 3
• Computing
• 4 activities
• 25 min–50 min

Learning Objectives

1. Design a simple game character that responds to at least three different user inputs simultaneously.
2. Analyze a given code snippet to identify how multiple event listeners trigger distinct actions.
3. Evaluate the effectiveness of conditional statements in preventing game-breaking errors, such as a character moving through walls.
4. Create a program that uses a combination of key presses and mouse clicks to control different game elements.
5. Explain the logic behind chaining multiple conditions to create a complex character behavior.

Project-Based Learning

⏱ 35 min·Pairs

Pair Coding Challenge: Multi-Control Character

Pairs use block-based software to code a sprite that jumps on spacebar, moves left-right on arrows, and changes colour if touching an edge. First, brainstorm controls together. Then code, test, and swap roles to add one condition each. Share working games with the class.

Prepare & details

Analyze how multiple events can make a character jump and run simultaneously.

Facilitation Tip: During Pair Coding Challenge, assign roles so one student types while the other tests, ensuring both engage with the logic.

Setup: Flexible workspace with access to materials and technology

Materials: Project brief with driving question, Planning template and timeline, Rubric with milestones, Presentation materials

• Apply
• Analyze
• Evaluate
• Create
• Self-Management
• Relationship Skills
• Decision-Making

Project-Based Learning

⏱ 45 min·Small Groups

Small Group Debug Relay: Condition Fixes

Divide code with multiple events into stations, each with a bugged condition, like endless jumping. Groups rotate, fix one issue per station using test runs, and note changes. Regroup to combine fixes into a full game.

Prepare & details

Design a program that uses different events to control different aspects of a game.

Facilitation Tip: In Small Group Debug Relay, have each group start with the same buggy code to highlight common misconceptions about condition placement.

Setup: Flexible workspace with access to materials and technology

Materials: Project brief with driving question, Planning template and timeline, Rubric with milestones, Presentation materials

• Apply
• Analyze
• Evaluate
• Create
• Self-Management
• Relationship Skills
• Decision-Making

Project-Based Learning

⏱ 50 min·Whole Class

Whole Class Game Design Share: Event Mapping

Students sketch game ideas with multiple events on paper first. Code individually, then present to class for votes on best conditions. Class votes and suggests improvements before final tweaks.

Prepare & details

Evaluate the importance of clear conditions in event-driven programming.

Facilitation Tip: For Whole Class Game Design Share, display student code on the board so the class can see how different event-condition pairs achieve the same goal.

Setup: Flexible workspace with access to materials and technology

Materials: Project brief with driving question, Planning template and timeline, Rubric with milestones, Presentation materials

• Apply
• Analyze
• Evaluate
• Create
• Self-Management
• Relationship Skills
• Decision-Making

Project-Based Learning

⏱ 25 min·Individual

Individual Extension: Custom Condition Game

Each student adds two personal conditions to a base game template, such as scoring only if moving fast. Test against self-set goals and record video explanations of event interactions.

Prepare & details

Analyze how multiple events can make a character jump and run simultaneously.

Facilitation Tip: During Individual Extension, provide a starter project with placeholder sprites to reduce cognitive load and focus on logic.

Setup: Flexible workspace with access to materials and technology

Materials: Project brief with driving question, Planning template and timeline, Rubric with milestones, Presentation materials

• Apply
• Analyze
• Evaluate
• Create
• Self-Management
• Relationship Skills
• Decision-Making

Teaching This Topic

Teach this topic by modeling parallel event handling first, using a shared screen to show how multiple inputs can trigger actions at the same time. Avoid teaching conditions in isolation; instead, connect them directly to events so students see their purpose. Research shows that students grasp logic better when they test and debug their own code rather than watching a teacher demonstrate.

What to Expect

Successful learning looks like students designing a character that moves with multiple inputs and uses conditions to control actions. They should explain why certain conditions are necessary and adjust their code based on peer feedback. By the end, they can articulate how events and conditions work together to create interactive rules.

Watch Out for These Misconceptions

Common Misconception

During Pair Coding Challenge, watch for students who assume events must happen one at a time and write code that forces sequential inputs.

What to Teach Instead

After the pair shares their movement rules, ask the class to press two keys at once. Have students observe that both actions occur simultaneously, then revise their code to allow parallel inputs.

Common Misconception

During Small Group Debug Relay, students may think conditions are optional or decorative.

What to Teach Instead

During the relay, pause the group after they fix the first bug and ask them to disable their condition blocks. Have them test the program and describe what happens without the logic gates controlling the actions.

Common Misconception

During Whole Class Game Design Share, students might believe adding more events always improves the game.

What to Teach Instead

After reviewing a shared design, ask the class to identify which events feel unnecessary or confusing. Guide a discussion about how each event serves a clear purpose and how conditions help manage complexity.

Assessment Ideas

Exit Ticket

After Pair Coding Challenge, provide a short code snippet with two event listeners and one conditional. Ask students to write down what will happen when the user presses the up arrow and what will happen if they click the mouse. Collect responses to check their understanding of parallel events and conditions.

Quick Check

During Small Group Debug Relay, observe how students explain the bug they're fixing. Ask targeted questions like, 'What event triggers this action?' or 'What condition must be true for the jump to work?' Note which students can clearly describe the relationship between events and conditions.

Discussion Prompt

After Whole Class Game Design Share, pose a scenario: 'A character needs to collect a coin only if it’s standing on a platform. How would you use events and conditions to make this happen?' Facilitate a brief discussion and listen for explanations that connect events (e.g., coin touch) with conditions (e.g., platform contact).

Extensions & Scaffolding

• Challenge students to add a third event, such as a spacebar press, that makes the character double-jump only if it’s already in the air.
• Scaffolding: Provide a template with pre-written condition blocks and highlight the missing parts for students to complete.
• Deeper exploration: Ask students to design a game where events and conditions prevent a character from moving off-screen, requiring them to use both logical operators and boundary checks.

Key Vocabulary

Event Listener	A function or command that waits for a specific user action, like a key press or mouse click, to happen before running other code.
Conditional Statement	A programming structure, often an 'if-then-else' statement, that checks if a condition is true before running a specific block of code.
Boolean Logic	A type of logic that uses true or false values, often used within conditional statements to make decisions in a program.
Simultaneous Events	When a program can detect and respond to more than one user input or internal event happening at the same time.