The twelfth meeting was held January 30-31, 2004, at Xavier University. The readings were: the Preface, and Chapters 1, 6, and 11 from George Polya's Mathematics and Plausible Reasoning (1954); the Preface and Appendix to vol 1, and Chapters 13-14 of vol. 2 from Mathematical Discovery (1961). This was the second meeting on the work of Polya, and we focused deliberately on his work in teaching mathematics. For details see Danny Otero's report of the meeting.