Many topological graphs have edges that cross. The aim is to re-draw the graph in such a way that none of the edges cross. The task informs students they are required to design a printed circuit board and since the wires are not insulated they must not cross.

Planarity: presentation - an...

From the Science and Technology Facilities Council (STFC), this poster describes the Planck mission that is enabling scientists to map ripples in the electromagnetic echo of the Big Bang, across the entire sky, to build up a picture of the early Universe in unprecedented detail. The resource looks at: * The...

The aim of this experiment is for students to be able to determine for themselves the threshold voltage needed to activate a range of LEDs of different colours. From these values, combined with a knowledge of the wavelengths of each LED, students can plot a graph to determine a value for Planck’s constant. The...

Planet Earth podcasts, from the Natural Environment Research Council (NERC) and hosted by Planet Earth online, cover a variety of topics about the world around us. Each podcast reports on two to four different stories, describing research projects and studies, dangers to the environment and wildlife, and proposed...

In this section you will be able to explore three different sessions. You might like to view them more than once, each time focusing on a different aspect of the planning. There are many ways to promote effective learning. You can explore some of these in the 'Thinking about learning' section on this resource. The...

Produced by the Qualifications and Curriculum Authority in 2009, this guidance supports the planning, development and implementation of the curriculum for pupils with learning difficulties. It draws on effective practice across a range of schools and can be used in...

In this resource students measure lengths from scale drawings then use ratio scales to find the actual lengths.

The resource is part of the Nuffield Maths Level 1 Foundation resource collection.

This resource is part of a Nuffield Maths collection exploring Shape and Space. The demand is roughly equivalent to that in Higher Level GCSE and Level 2 Functional Mathematics.

The ‘Plans’ resource asks students measure lengths from scale drawings then use ratio scales to find the actual lengths.

Most current theories of adaptation and evolution are based on an organism’s inflexible genetic inheritance, where variation depends on chance mutations to the DNA sequence. Now, biologists studying epigenetics are trying to uncover the roles of this more flexible system.

This book, from Unilever, was produced in the context of the availability of proteinaceous foods and world nutritional requirements. A table of foods with percentage content of protein, fat and carbohydrate is provided – together with a breakdown of the comparative animal/vegetable protein consumption by continent...