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• TLF-IDM016357

An interactive applet in which students explore the effect of reflection in a variety of axes.

• TLF-IDM016431

An interactive applet in which students classify triangles as isosceles, scalene and equilateral.

• TLF-IDM016233

An animated tutorial about ordering numbers with up to 3 decimal places. An interactive quiz is included.

• TLF-IDM021010

This sequence of lessons focuses on what a binary number is, what a decimal number is, why binary numbers are important in digital systems and how to read and understand a binary number.

• TLF-IDM021024

In this sequence students plan, create and edit a program that will ask maths questions that are harder or easier depending on user performance.

• TLF-IDR6369

This is a photograph showing the mounted hide of Phar Lap, a champion racehorse in the late 1920s and early 1930s. He was a large chestnut-coloured gelding who stood 17.1 hands (about 174 cm) tall.

• TLF-IDR9656

This 1940 black-and-white photograph shows a young boy, not entirely at ease, being vaccinated against diphtheria at East Brisbane State School by the City Medical Officer of Health, Dr R Weaver. A woman dressed in white stands behind the boy and steadies his outstretched left arm for the injection. Medical implements and ...

• TLF-IDR8848

This is an edited sound recording of Ian Ritchie recalling the first launch of a Europa Blue Streak rocket from the Woomera rocket range in South Australia on 5 June 1964. Ritchie, an engine technician at the range, tells of the noise at lift-off and how the first flight of the rocket was cut short. The recording was made ...

• TLF-IDR6384

This is a close-up of a mechanical model of part of the solar system, commonly known as an orrery, made by renowned London instrument maker Benjamin Martin in about 1770. This bronze model features a cylindrical clockwork mechanism with an orb representing the Sun placed in the centre. Extending from this on an arm is a ...

• TLF-IDR8170

This is a colour photograph showing the carcass of a southern humpback whale ('Megaptera novaengliae') on the wooden slipway of the Tangalooma Whaling Station on Moreton Island in Queensland. The whale is intact with its underside uppermost, showing distinctive colourings and markings, including the ventral grooves. Onlookers, ...