This and the other months on the “Thru the Year” tab are sequenced to be a bit ahead of where most AP classes are in the month listed. The September page list past post on topics stared near the end of September into October. October’s page has November topics, and so on.

Local Linearity The graphical manifestation of the derivative

**Definition of Derivative**

Derivative Rules I Using the limit definition

Derivative Rules II the Product Rule

Derivative Rules III the Quotient Rule

Differentiation Techniques The definition, basics, product rule, Quotient Rule

Foreshadowing the Chain Rule and Power Rule Implies Chain Rule

The Chain Rule and another The Chain Rule

Implicit Differentiation Approaches to teaching about implicit differentiation

At Just the Right Time A good problem

**VIDEOS on Computing Derivatives **

**The Mean Value Theorem**

Foreshadowing t he Mean Value Theorem

Revised and updated October 19, 2018