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Unit 3

Bivariate data

General Free
Reading a least-squares line

Unit 3 · Bivariate data · Worked examples

Worked examples on interpreting slope, intercept and r, and on when not to extrapolate.

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Complex numbers

Specialist Free
Complex multiplication as rotation

Unit 3 · Complex numbers · Notes

Short notes and six questions on what multiplication does to points in the complex plane.

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Differential calculus

Methods Free
Chain rule practice set

Unit 3 · Differential calculus · Worksheet

Twelve calculator-free questions with full worked solutions.

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Statics

Engineering Free
Free body diagram checklist

Unit 3 · Statics · Checklist

A one-page method for drawing free body diagrams, with two worked beam examples.

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Units 3–4

External exam

Methods Free
Every past QCAA complex unfamiliar question, 2020–2025

Units 3–4 · External exam · Interactive

All 26 complex unfamiliar questions from the 2020–2025 external exams, each with an interactive visualisation and the marking guide one mark at a time.

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Specialist Free
Every past QCAA complex unfamiliar question, 2020–2025

Units 3–4 · External exam · Interactive

All 24 Specialist complex unfamiliar questions from the 2020–2025 external exams, each with an animation and an interactive to work through, then the marking guide one mark at a time.

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Year 9

Algebra

Years 7–10 Free
Expanding brackets with area models

Year 9 · Algebra · Worksheet

Ten questions that move from multiplying numbers to expanding algebraic brackets.

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Units 1–2

Complex unfamiliar questions

Methods Premium
Units 1 and 2 complex unfamiliar questions

Units 1–2 · Complex unfamiliar questions · Interactive

Two complex unfamiliar questions for every topic in Units 1 and 2, each with an animation, an interactive and the marking guide one step at a time.

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