Videos
Choose from over 80 mathematical videos.Our team of top teacher mathematicians have put together all the important topics and explain them with the types of examples that you would find in a normal textbook or exam.

Differentiating sines and cosines
Differentiating sines and cosines. This video covers the differentiation of sin x and cos x from first principles.Length: 
Differentiation by Taking Logarithms
Differentiation by taking logarithms. The logarithm of a product is a sum, and so logarithms can be used to simplify certain functions for the purpose of differentiation.Length: 
Differentiation from First Principles
Differentiation is about rates of change for example, the slope of a line is the rate of change of y with respect to x. To find the rate of change of a more general function, it is necessary to take a limit. This is done explicitly for a simple quadratic function.Length: 
Equations of straight lines
Equations of straight lines. In this unit the equation of a straight line is established using either information about its gradient together with the coordinates of a point on the line, or alternatively the coordinates of two different points on the line. The different ways of expressing the final equation are explored.Length: 
Expanding and Removing Brackets
Expanding brackets means being able to rewrite the expression in an equivalent form without any brackets. This video investigates the mathematics behind expanding and removing brackets and then shows examples using simple expressions through to nesting brackets (brackets inside other brackets).Length: 
Exponential and logarithm functions
Exponential and logarithm functions. Exponential functions and logarithm functions are important in both theory and practice. In this unit the graphs of exponential and logarithm functions are examined and their relationships established.Length: 
Extending the Table of Derivatives
Extending the table of derivatives. In this video the Table of Derivatives continues to be built using rules described in other units.Length: 
Factorising Quadratic Equations
Factorising can be thought of as reversing the process used to 'remove' brackets from an expression. This video looks at factorising by inspection and then other methods of factorising used for example when the coefficient of x2 is not 1 or when there is no constant term.Length: 
Finding areas by integration
Finding areas by integration. In simple cases, areas can be found by evaluating a single definite integral. Sometimes the integral gives a negative answer, and sometimes the correct answer can be obtained only by splitting the area into several parts and adding and subtracting appropriately.Length: 
Fractions  adding and subtracting
This video shows how to add and subtract fractions with the same denominators, different denominators and with mixed fractions.Length: