Check out this topic in the following free, online textbooks:

• APEX Calculus: Chapter 3

• Active Calculus: Sections 3.1, 3.2

• Community Calculus: Chapter 5

Online Tutorials (including exercises with solutions)

MathIsFun: Maxima/Minima

S.O.S Math

• Differentiation and Continuity

• The Mean-Value Theorem

• Monotonicity and the Sign of the Derivative

• Critical Points

• Global Extrema

• Concavity and Points of Inflection

Problem Sets with solutions

Visual Calculus

• Drill on finding the maxima and minima of a function on a closed interval.

• Drill on applying the Mean Value Theorem.

• Drill on using the First Derivative Test.

• Drill on determining the intervals of concave upward and concave downward and the inflection points of a function.

eCalculus.org and UC Davis Math

• Problems on  detailed graphing using first and second derivatives

Free Worksheets (with solutions)

Paul's Online Notes

• Critical Points

• Minimum and Maximum Values

• Finding Absolute Extrema

• The Shape of a Graph, Part I

• The Shape of a Graph, Part II

• The Mean Value Theorem

KUTA Software

• Rolle's Theorem

• Mean Value Theorem

• Intervals of Increase and Decrease

• Intervals of Concavity

• Relative Extrema

• Absolute Extrema

• Curve Sketching

• Comparing a Function and its Derivatives

Free Quizzes (with solutions)

Visual Calculus

• Quiz which tests the ability to determine graphically information about a function and its derivatives.

• Quiz which tests the ability to determine information about the graph of a function from information about its derivatives.

• Quiz on determining which graph is the graph of a function, its derivative and its 2nd derivatives.

Zweigmedia

• Maxima and minima

• Analyzing graphs