An Introduction to the gradient function:

The rule for differentiating terms in the form ax^n:

How to find tangents and normals:

Introduction to stationary points:

Finding stationary points:

How to use the GDC (Ti 84 series) to plot graphs and find max, min, intercepts:

A past paper question on calculus:

Another past paper question on calculus:

A great general revision video covering the full calculus topic: