Showing results for "Proof without words"

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In this resource from Shirley Fall, students are presented with a general straight line y=mx+c and are shown that the gradient of the line between any two points that lie on the line is always equal to m. Students should be encouraged to explain the proof to check...

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These technical briefs look at agricultural production in many parts of the world, carried out on a small-scale by farmers. Relatively small improvements in agricultural practice can have a big impact on yield and dramatically improve the life of a farmer and their family.

Technical briefs are documents...

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Three RISP activities designed to introduce or consolidate basic algebraic skills.

Brackets Out, Brackets In: students are asked to insert integers into a statement containing brackets in order to...

In this resource, students use their STEM skills to help them design and build a model of a flood- proof house. Activities to help them with their design include testing materials (for strength and absorbency) and structures. Set on a fictitious island coping with the devastating effects of flooding caused by...

In this activity, students are presented with a series of different sized equilateral triangles each containing a number of circles, each of radius one unit. Students are required to find the exact area of each triangle.

The activity is extended into three dimensions by considering the volume of shapes...

These technical briefs look at the ways Practical Action have helped poor communities to make the best use of their own labour and to use locally produced building materials and techniques that they can afford and manage.

Technical briefs are documents produced by Practical Action which are freely available...

Creative Use of Odd Moments contains seven activities which are ideal for use as starter activities, extension questions or to develop mathematical thinking and problem solving. Each activity is accompanied by teacher notes, supplying the answers and explanations of the mathematics involved....

This task is designed to assess how well students understand addition, working methodically, and giving a proof.

A cross is given that uses two squares on each arm around a central square to give nine squares in total. The numbers from 1 to 9 must be placed in the squares so that the vertical and horizontal...

The graph of a cubic function with three real roots is drawn. A circle is then drawn so that the circumference of the circle passes through two adjacent roots. A tangent to...

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These technical briefs focus on energy access as a key element in lifting people out of poverty. In remote locations small-scale renewable...

Have you ever wondered about the earth’s wild and wonderful weather? Think you have what it takes to build an earthquake-proof house or survive in an extreme environment?

In this programme, pupils will make models to help them understand how weather and extreme events occur, and what their impact can be....

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