Calculating slope of tangent line using derivative definition : Khan Academy on a Stick

Khan Academy on a Stick

Introduction to derivatives

Derivative as slope of a tangent line
Tangent slope as limiting value of secant slope example 1
Tangent slope as limiting value of secant slope example 2
Tangent slope as limiting value of secant slope example 3
Calculating slope of tangent line using derivative definition
The derivative of f(x)=x^2 for any x
Formal and alternate form of the derivative
Formal and alternate form of the derivative for ln x
Formal and alternate form of the derivative example 1
Calculus: Derivatives 1
Calculus: Derivatives 2

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