Technologies · Year 10

Active learning ideas

Functions and Procedures

Active learning works for functions and procedures because students must physically break problems into parts, write them, and see how blocks connect. Writing real code in pairs or groups helps students grasp reuse and scope faster than passive reading about parameters.

• ACARA Content Descriptions
• AC9DT10P04
• AC9DT10P05

• 25–45 min
• Pairs → Whole Class
• 4 activities

Activity 01

• Peer Teaching
• 35 min · Pairs

Pair Programming: Modular Game Scorekeeper

Pairs plan a simple game, then write functions for updating scores, checking wins, and displaying results. Test each function with sample data before combining them. Pairs swap programs to suggest improvements.

Analyze the benefits of using functions for code modularity.

Facilitation Tip

During Pair Programming: Modular Game Scorekeeper, assign one student to write the function while the other tests it immediately with different inputs to reinforce reusability.

What to look for

Provide students with a small code snippet containing a function definition and a call. Ask them to: 1. Identify the function's name, parameters, and return value (if any). 2. Explain in one sentence what the function does. 3. Predict the output of the code snippet.

• Understand
• Apply
• Analyze
• Create
• Self-Management
• Relationship Skills

Activity 02

• Peer Teaching
• 45 min · Small Groups

Small Groups: Code Refactoring Relay

Provide groups with repetitive linear code for a task like inventory tracking. Each member refactors one section into a function, passes to the next, then groups test the full modular version. Discuss changes in efficiency.

Design a set of functions to solve a multi-step problem.

Facilitation Tip

In Code Refactoring Relay, give each group a fixed time per station to ensure everyone participates in restructuring and documenting the code.

What to look for

Present students with a simple problem, like calculating the area of a rectangle. Ask them to write a function that takes length and width as parameters and returns the area. Observe students as they write the function, checking for correct syntax, parameter usage, and return statements.

• Understand
• Apply
• Analyze
• Create
• Self-Management
• Relationship Skills

Activity 03

• Peer Teaching
• 25 min · Whole Class

Whole Class: Variable Scope Debug Challenge

Display buggy code on screen with global and local variable errors. Class votes on fixes, tests predictions in a shared editor, and traces variable values step by step. Review common pitfalls together.

Evaluate the impact of global versus local variables within functions.

Facilitation Tip

For Variable Scope Debug Challenge, project the first error on the board and ask students to trace the variable’s path aloud before allowing fixes.

What to look for

In pairs, students are given a piece of code that uses global variables extensively. They must refactor the code to use local variables and functions where appropriate. Students then swap their refactored code and provide feedback to their partner on clarity, efficiency, and correctness, focusing on variable scope.

• Understand
• Apply
• Analyze
• Create
• Self-Management
• Relationship Skills

Activity 04

• Peer Teaching
• 30 min · Individual

Individual: Procedure Design Portfolio

Students design procedures for a multi-step problem, like a quiz app, documenting parameters and returns. Self-test with inputs, then peer review one function each for reusability.

Analyze the benefits of using functions for code modularity.

What to look for

Provide students with a small code snippet containing a function definition and a call. Ask them to: 1. Identify the function's name, parameters, and return value (if any). 2. Explain in one sentence what the function does. 3. Predict the output of the code snippet.

• Understand
• Apply
• Analyze
• Create
• Self-Management
• Relationship Skills

A few notes on teaching this unit

Start with concrete examples students can trace by hand, like a simple area calculator, then move to drawing boxes around functions to visualize boundaries. Avoid rushing to abstract theory before students have felt the pain of repeated code. Research shows that slow, hands-on decomposition builds stronger mental models than early exposure to advanced concepts like closures.

Students will demonstrate understanding by creating functions with clear purposes, calling them correctly, and explaining how variables behave inside and outside functions. They will also refactor messy code into clean modules and debug scope errors with confidence.

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Watch Out for These Misconceptions

• During Pair Programming: Modular Game Scorekeeper, students may think functions are only for shortening code.

  Have pairs call the same scoring function with three different game scenarios and observe how the single function handles varied data without rewriting logic.

• During Variable Scope Debug Challenge, students may assume global variables are always safer.

  Provide a broken example where a global variable is accidentally changed, then guide students to use print statements to track its value and refactor it into a local variable.

• During Procedure Design Portfolio, students may insist every function needs parameters.

  Have students include one procedure without parameters for a fixed task like resetting the score and compare it to parameterized versions in their portfolio reflections.

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Methods used in this brief

• Peer Teaching