Alfred Del-Pin

Following on from 1A this looks at evaluating algebraic expressions by rearranging and then substituting AND by substituting first before rearranging the numerical expression. Fully editable to make your life easy

Solving simple linear equations algebraically. Suitable for Years 9, 10 and 11. Full editing available to make your life easier.

Strictly not deriving the general rule but students have never had any difficulty seeing and accepting it from examples

Using the derivative at a point to determine the equation of the tangent

Introducing Differentiation by First Principles