Recommended
Recommended Blackjack Websites
Here's a list of blackjack strategy pages that I recommend. I've sifted through hundreds (maybe thousands) of Internet pages and sites to try to find quality information to recommend. I've tended toward listing math-heavy resources, because those are often the most useful pages, and they're also less likely to contain an excessive amount of extraneous advertising.
Blackjack Betting Systems and Strategies: The Mathematics Behind the Game
An academic article from Kirk Conrad and Brandon Smith. They do a good job of explaining how the math affects various blackjack betting systems and strategies.
Blackjack Probability Lesson Plan
This one is a lesson plan for match teachers who want to incorporate blackjack into their math lessons.
Classic Party Games for Seniors
A PDF file with a list of resources of use to people planning events to seniors. One of the games they recommend for seniors is--you guess it--blackjack.
The Kelly Criterion in Blackjack and Sports Betting
The Kelly Criterion is a mathematical way of determining how much of a gambler's bankroll should be risked in order to maximize profits while minimizing the chances of going broke because of standard deviation (bad luck).
The Mathematics of the Movie 21
I enjoyed this page because it focuses on mathematical ideas from the movie 21 that DON'T relate to card counting. The author's opinion is that other websites already do a good job of explaining the math behind card counting, so why not cover some other topics?