Scaffolded worksheets where students practice finding unknown sides and angles using SOHCAHTOA. Students are guided to label sides, choose a ratio, write their equation, solve the equation and give the answer. There are three separate sheets: one where the unknown side is the numerator, one where the unknown side is the denominator and one where the unknown is the angle.

On MathsFaculty: https://mathslinks.net/faculty/scaffolded-trigonometry-worksheets

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An explanation of why airport runways use digits representing bearings as identifiers.

On MathsLinks: https://mathslinks.net/links/the-simple-secret-of-runway-digits

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This is a story about pizza and geometry. Roy Chandan ordered a 9-inch pizza, and the waiter brought him two 5-inch pizzas instead. Chandan was getting an inch for free, the waiter said.

The seller mistakenly assumed a linear increase in area with diameter. This is not the case.

On MathsLinks: https://mathslinks.net/links/pizza-exchange-rate

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There are countless different shapes that can be created using the seven *Tangram* tiles. What can you come up with?

On MathsLinks: https://mathslinks.net/links/tangram-builder-a-mathigon

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An animation showing the relationships between the circumference of a circle and its diameter.

On MathsLinks: https://mathslinks.net/links/true-meaning-of-pi

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A collection of questions from QLD Mathematical Methods exam papers.

On MathsLinks: https://mathslinks.net/links/qld-mathematical-methods-complete-external-exam-question-database

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This interactive explanation shows you why polling results should be taken with a grain of salt. In a lot of cases decimals will prove to be meaningless and changes of less than 2 percentage points shouldn't be subject to much analysis. The interactive is completely visual and very intuitive.

On MathsLinks: https://mathslinks.net/links/rock-n-poll

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An interactive simulation that uses two-step probabilities to make sense of a taxi crash at night.

On MathsLinks: https://mathslinks.net/links/taxi-cab-problem

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This book serves as a collection of digitally interactive Open Middle exercises.

On MathsLinks: https://mathslinks.net/links/open-middle-exercises

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Whilst presented in French, this interact box plot still makes sense.

On MathsLinks: https://mathslinks.net/links/box-plot-with-an-interactive-applet

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An interactive showing the sum of the angles of a triangle against a protractor.

On MathsLinks: https://mathslinks.net/links/sum-of-angles-of-a-triangle

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ABC News have turned the 2021 census into 100 dots.

On MathsLinks: https://mathslinks.net/links/census-2021-a-australia-as-100-people

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Bowland Maths aims to make maths engaging and relevant to pupils aged 11-14, with a focus on developing thinking, reasoning and problem-solving skills. Site includes assessment tasks and classroom projects.

On MathsLinks: https://mathslinks.net/links/bowland-maths

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A library of more than 700 engaging and challenging mathematics problems, arranged for easy access by topic, with numerous suggestions for using them with students.

On MathsLinks: https://mathslinks.net/links/stellas-stunners

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Find out all about the fundamental building blocks of maths: prime numbers! You’ll learn how prime numbers can be multiplied together to create composite numbers, how many prime numbers there are, and even the ways that prime numbers keep us safe! You’ll also get to help Detective Will with a puzzling case of prime number fraud!

On MathsLinks: https://mathslinks.net/links/the-building-blocks-of-maths-prime-numbers

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Matt Parker discusses a Reddit meme and the values of sin *θ*.

Matt uses this Trigonometry Tracer.

On MathsLinks: https://mathslinks.net/links/is-this-the-ultimate-sine-pattern

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Using a cloud computing service, π has been calculated to 100 trillion digits.

On MathsLinks: https://mathslinks.net/links/new-world-record-100-trillion-digits-of-pi

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This link has many stage 4-5 lessons planned out in a self-guided manner and can help students grasp ideas using visuals that we might not have in class.

On MathsLinks: https://mathslinks.net/links/almost-fun-lessons

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A generator that creates a future value table for $1. Useful for creating worksheets or writing exams when you need a customised future value table.

On MathsLinks: https://mathslinks.net/links/future-value-table-generator

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Find a polynomial with the finite difference method. Take successive differences of a sequence to find the polynomial that made it.

On MathsLinks: https://mathslinks.net/links/the-finite-difference-method

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