Technologies · Year 6

Active learning ideas

Identifying Sub-problems and Dependencies

Active learning works because abstraction and pattern recognition are skills best developed through concrete, hands-on experiences. Students need to practice filtering details and spotting relationships with real materials and scenarios, not just listening to explanations.

• ACARA Content Descriptions
• AC9TDI6P03

• 15–40 min
• Pairs → Whole Class
• 3 activities

Activity 01

• Gallery Walk
• 30 min · Whole Class

Gallery Walk: The Map Challenge

Students are shown three different 'maps' of the same area: a satellite photo, a street map, and a simplified transit map. They move around the room and use sticky notes to identify what information has been 'abstracted' (removed) from each one and why.

Analyze the dependencies between different sub-problems in a larger project.

Facilitation Tip

During the Gallery Walk, position yourself near one map station to listen for students who are using vague language like 'stuff' or 'things' and gently ask them to point to the exact part of the map they mean.

What to look for

Present students with a scenario, for example, 'Planning a birthday party.' Ask them to list three sub-problems and identify one dependency between them. For instance, 'Buying the cake' depends on 'Deciding on the flavour'.

• Understand
• Apply
• Analyze
• Create
• Relationship Skills
• Social Awareness

Activity 02

• Inquiry Circle
• 40 min · Small Groups

Inquiry Circle: Pattern Detectives

Groups are given a set of different board game rules. They must find the 'patterns' that all the games share (e.g., 'taking turns,' 'having a goal,' 'using a dice') and create a 'Master Rule Set' that could work for any new game.

Justify the order in which sub-problems should be addressed.

Facilitation Tip

In Collaborative Investigation, circulate and ask pairs to explain how the pattern they found in one system (e.g., music) connects to a second system (e.g., code), ensuring they articulate the 'repeat' or 'loop' relationship.

What to look for

Pose the question: 'Imagine you are building a model airplane. What are two sub-problems, and which one must be completed first? Explain why.' Encourage students to use the terms 'sub-problem' and 'dependency' in their answers.

• Analyze
• Evaluate
• Create
• Self-Management
• Self-Awareness

Activity 03

• Think-Pair-Share
• 15 min · Pairs

Think-Pair-Share: Emoji Abstraction

Students are asked to draw an emoji for a complex emotion like 'disappointed but hopeful.' They share their drawings in pairs and discuss which facial details they kept and which they ignored to make the meaning clear. This is a perfect example of abstraction.

Construct a flow chart showing the decomposition of a daily routine.

Facilitation Tip

During Think-Pair-Share, listen for students who only describe emojis literally and guide them to explain what the emoji represents or how it functions in a sequence.

What to look for

Provide students with a simple daily routine, like 'Getting ready for school.' Ask them to draw a basic flowchart showing at least four steps and indicate any dependencies. For example, 'Choosing clothes' must happen before 'Getting dressed'.

• Understand
• Apply
• Analyze
• Self-Awareness
• Relationship Skills

A few notes on teaching this unit

Experienced teachers approach this topic by modeling how to break problems into smaller parts and showing how dependencies create order. Avoid rushing to solutions; instead, slow down to emphasize the process of identifying what depends on what. Research suggests that students learn abstraction best when they physically manipulate or rearrange materials to highlight what matters and what can be ignored.

Successful learning looks like students identifying sub-problems and dependencies clearly, explaining their reasoning with examples, and applying these concepts to new situations. They should move from vague ideas to precise, actionable steps in their thinking.

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Watch Out for These Misconceptions

• During Gallery Walk, watch for students who think abstraction simply means 'making something smaller or easier.'

  Use the map stations to redirect them: ask them to compare a highly detailed map to a simplified one, then have them explain which one works better for giving directions and why.

• During Collaborative Investigation, watch for students who struggle to connect patterns across subjects like music and code.

  Have them physically clap or tap the rhythm of a song while another student traces a loop in a simple code example, then ask them to describe how the two actions represent the same pattern.

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Methods used in this brief

• Gallery Walk
• Inquiry Circle
• Think-Pair-Share