This resource contains two interactive excel files dealing with the graphs of trigonometric functions.

Trigonometry: X=cos, Y=sin...

This collection of interactive excel sheets looks at a circle of radius 1 and the corresponding values generated for cosθ and sinθ.

The first interactive sheet illustrates that for the unit circle, X = cosθ and Y =...

Two animations, from the Wellcome Trust, illustrate the life cycle of the trypanosomiasis protozoan parasite. They illustrate the journey of these single celled parasites, which cause human African trypanosomiasis or sleeping sickness, from the gut of the tsetse fly...

From the Wellcome Trust, this animation shows how the human immune system attempts to contain a tuberculosis infection and how the bacteria are transmitted to new people.

Tuberculosis usually affects the respiratory...

The first two sheets use maps of New York to show how vectors can be used to specify journeys. Answers in terms of a and b can be revealed.

The third sheet shows that the vectors a and b used to describe relative...

This interactive resource, produced by the University of Leicester, is designed to enable students to explore vectors, beginning with the definition of a vector followed by the algebra of vectors and the scalar product. The opening slides of the presentation explain the difference between scalar and vector...

This series of interactive excel sheets explore calculating the probability of events from Venn diagrams. Another resource exploring the use of Venn ...

This collection of interactive excel sheets investigate volumes of revolution by integration.

The first sheet plots the function y= ax^2...

Produced by the Wellcome Trust, these resources include an interactive evolutionary tree and a video of the Tree of Life. These materials will help students to find out more about the work of Charles Darwin and evolution. The resources contain:

Tree of life video: The video is a short...

From the Wellcome Trust Sanger Institute, this resource contains an animation that takes a journey which zooms in from the surface of the body into a cell. It illustrates the relationship between the nucleus, chromosomes, genes and DNA.

Each stage is at higher magnification to show where the genome is found...

Produced by the Wellcome Trust, this animation helps to illustrate where and how the human genome is stored within our cells and bodies. It takes a journey which starts with the whole human body before looking into a liver cell and then the cell's nucleus. The animation shows the arrangements of chromosomes within...

This group of interactive excel worksheets look at the series of identities of the form

aSin(x) ± bCos(x) and aCos(x) ± bSin(x),

where a=RCos(α), b = RSin(α), R=√(a...

This simulation allows students to test the pH of substances like coffee, spit, and soap to determine whether each is acidic, basic, or neutral. It can be used to visualise the relative number of hydroxide ions and hydronium ions in solution, switch between logarithmic and linear scales, and investigate whether...