Annenberg Foundation
Annenberg Learner: Mathematics Illuminated: Combinatorics Counts
Video presentation on combinatorics, or the "mathematics of counting complicated configurations." Offers several examples of combinatorics as used in real world situations and professions. [28:26]
Texas A&M University
Wtamu Virtual Math Lab: College Algebra: The Fundamental Counting Principle
Contains a tutorial on the fundamental counting principle that includes many examples and sample problems.
Other
Lake Tahoe Com. College: Fundamental Counting Principle
Explains the fundamental principle of counting, which is the beginning point for any study of counting techniques such as combinations and permutations.
University of Colorado
University of Colorado: Discrete Mathematics Project: Venn Diagram Activity
A lesson plan on the use of Venn diagrams for problem-solving.