Technologies · Year 9

Lesson 1

Follow data through a real network and pin down exactly what switches, routers, access points and servers each do.

⏱ 20 min · 8 questions

Lesson 2

Analyse how 3D printing, robotics and AI-driven design are changing what gets made, where and by whom.

⏱ 20 min · 8 questions

Lesson 3

Compare star, bus, ring and mesh layouts and choose one by weighing reliability, cost and performance.

⏱ 20 min · 8 questions

Lesson 4

Analyse real dilemmas designers face, from planned obsolescence to the safety of the workers who make products.

⏱ 20 min · 8 questions

Lesson 5

See how firewalls, authentication and user permissions decide who and what can reach data on a network.

⏱ 20 min · 8 questions

Lesson 6

Identify everyone a design affects, map their power and interest, and work through needs that pull in different directions.

⏱ 18 min · 8 questions

Lesson 7

Compare client-server, peer-to-peer and cloud models for storing and sharing data, including cost, control and privacy.

⏱ 20 min · 8 questions

Lesson 8

Use well-designed surveys, existing product analysis and trends to find out whether a new product idea has a real opportunity.

⏱ 20 min · 8 questions

Lesson 9

Apply run-length encoding by hand and explain how lossless compression shrinks files while keeping every bit.

⏱ 20 min · 8 questions

Lesson 10

Turn research into a precise, measurable design specification that every idea can be tested against.

⏱ 20 min · 9 questions

Lesson 11

Explain how lossy compression throws away data in images, audio and video, and decide when that trade-off is acceptable.

⏱ 20 min · 9 questions

Lesson 12

Analyse how patents and licensing reward inventors, spread knowledge and sometimes limit access to new technologies.

⏱ 20 min · 8 questions

Lesson 13

Combine conditions with and, or and not, and predict exactly which way a program’s decision will go.

⏱ 20 min · 9 questions

Lesson 14

Calculate stress and strain in a loaded member and use a factor of safety to decide whether it will fail.

⏱ 20 min · 8 questions

Lesson 15

Build truth tables for compound logical expressions and use them to check that an algorithm’s rule does what it should.

⏱ 20 min · 9 questions

Lesson 16

Discover why depth matters so much in beams and why triangles make trusses strong, stiff and light.

⏱ 20 min · 8 questions

Lesson 17

Design normal, boundary and invalid test cases that catch the bugs hiding at the edges of a program’s rules.

⏱ 20 min · 8 questions

Lesson 18

Calculate mechanical advantage, velocity ratio and efficiency for levers, pulleys and gears.

⏱ 20 min · 8 questions

Lesson 19

Split a program into functions with clear inputs and outputs, and trace how they call each other.

⏱ 20 min · 8 questions

Lesson 20

Use V = IR to calculate the voltage, current or resistance in simple circuits, including series resistors.

⏱ 20 min · 9 questions

Lesson 21

Store data as key-value pairs, then access, add and update entries and predict what short programs print.

⏱ 20 min · 9 questions

Lesson 22

Explain how a transistor uses a tiny sensor-controlled current to switch a much larger load on and off.

⏱ 20 min · 8 questions

Lesson 23

Slice, join and transform text with string methods, and predict exactly what short programs print.

⏱ 20 min · 9 questions

Lesson 24

Compare how solar, wind and hydro systems convert and store energy, and calculate what they can deliver.

⏱ 20 min · 9 questions

Lesson 25

Build presence, type, range and format checks into a data-collection system so bad data is stopped at the door.

⏱ 20 min · 8 questions

Lesson 26

See how GPS, sensors and drones let farmers treat each part of a paddock differently to save inputs and protect the land.

⏱ 20 min · 7 questions

Lesson 27

Classify data as qualitative or quantitative, discrete or continuous, and choose how to collect and store each kind.

⏱ 18 min · 8 questions

Lesson 28

Analyse the factors that threaten food security and evaluate technologies that could feed a growing world sustainably.

⏱ 20 min · 8 questions

Lesson 29

Link related tables with primary and foreign keys to build a relational database without repeated data.

⏱ 20 min · 8 questions

Lesson 30

Compare the life-cycle impacts of natural, synthetic and recycled fibres from raw material to landfill.

⏱ 18 min · 7 questions

Lesson 31

Write and predict the results of SQL SELECT queries that filter and sort data with WHERE and ORDER BY.

⏱ 20 min · 8 questions

Lesson 32

Explain the chemistry behind browning, caramel and creamy sauces so you can control them when cooking.

⏱ 20 min · 8 questions

Lesson 33

Spot trends and outliers in data, test them with the IQR rule, and decide whether a conclusion is really justified.

⏱ 20 min · 8 questions

Lesson 34

Compare pasteurisation, freeze-drying, modified-atmosphere packaging and high-pressure processing, and how each stops spoilage.

⏱ 20 min · 8 questions

Lesson 35

Use filters, pivot tables and interactive charts to explore data and draw conclusions you can defend.

⏱ 20 min · 8 questions

Lesson 36

Read Australian food labels to compare nutrition, find allergens and understand use-by and best-before dates.

⏱ 20 min · 8 questions

Lesson 37

Build a simple threat model for a digital system by identifying its assets, threats and vulnerabilities, then rating and treating each risk.

⏱ 20 min · 8 questions

Lesson 38

Read and build Gantt charts that show task order, dependencies, milestones and the critical path that sets a project’s deadline.

⏱ 20 min · 8 questions

Lesson 39

Recognise how attackers manipulate people through pretexting, baiting, tailgating and targeted phishing, and choose defences that actually work.

⏱ 18 min · 7 questions

Lesson 40

Plan for the risks of making a product — injuries, delays, breakdowns and material shortages — using a risk register, mitigation and contingency plans.

⏱ 20 min · 8 questions

Lesson 41

Use the Australian Privacy Principles to judge whether an organisation collects, uses, secures and shares personal information fairly and legally.

⏱ 20 min · 7 questions

Lesson 42

Follow how a CAD file becomes toolpaths and G-code that drive laser cutters, CNC routers and 3D printers, and calculate offsets and layer counts.

⏱ 20 min · 8 questions

Lesson 43

Explain how HTML structures a web page’s content while CSS controls how it looks, and why keeping them separate makes sites easier to maintain and more accessible.

⏱ 18 min · 8 questions

Lesson 44

Interpret the results of hardness, tensile and impact tests to decide which material best suits a product’s job.

⏱ 20 min · 8 questions

Lesson 45

Plan and run stakeholder interviews with unbiased questions, then turn what you hear into user stories with multi-condition acceptance criteria.

⏱ 20 min · 8 questions

Lesson 46

Use measured test results to decide exactly what to change in the next iteration of a prototype — and when to stop.

⏱ 18 min · 8 questions

Lesson 47

Manage a team software project with a Kanban board, work-in-progress limits and Git version control using branches, commits and pull requests.

⏱ 20 min · 8 questions

Lesson 48

Evaluate a product’s sustainability across its whole life cycle using your own weighted, measurable criteria — and see through greenwashing.

⏱ 20 min · 8 questions