Integration
The following tutorials cover all the AS integration methods
The basics
Using integration to find areas
Areas under a graph and between curves
Definite integration (similar to above)
Integrating between the curve and the Y axis
Reverse differentiation to find equation of a line
Finding the equation of a line (finding C) Part 1
Finding the equation of a line part 2
Volumes of revolution
Revolutions round the x - axis. Video 1 Video 2 Video 3
Revolutions round the y - axis video 1