The "Preparing Elementary Teachers to Teach Mathematics (PETTM) Project" (1988-1991) was a cooperative university/school effort to improve the teaching of mathematics by elementary teachers with primary focus on improving the university training of preservice teachers (PSTs) in mathematics. The goals of the PETTM Project included: (1) improving teacher preparation through a problem-solving focus in university mathematics courses; (2) developing a program to prepare students who wish to make mathematics their field of concentration; (3) developing jointly a plan for intensive early field experiences for all prospective teachers in local school districts; and (4) establishing support mechanisms to help practicing teachers: (1) broaden their views of the nature of mathematics, and (2) utilize innovative teaching techniques for improving their pupils' mathematical thinking skills and use of problem-solving strategies. The PETTM Project was comprised of four components: the "Content Component," the "Methods Component," the "School Component," and the "Research and Evaluation Component." This document, volume I of the project's 5-volume final report, provides an overview of the entire project. An introductory section includes the background and rationale for the project and a description of the four components of the project. Two sections provide lists of publications and presentations related to the PETTM Project. The final section describes educational products resulting from the project in three categories: (1) products related to the content component of the project; (2) products related to the methods component of the project; and (3) products related to the school component of the project. (MDH)