Debate about teacher supply, demand, retention, and attrition has been renewed in recent years by an increased concern about the reduced numbers of prospective teachers entering teacher education programs, the high attrition rate of beginning teachers, and the resulting teacher shortages. U.S. schools are experiencing teacher shortages, especially in low-income urban areas, because of increased school enrollment, teacher retirement, reduction in class size, teacher attrition, and turnover related to low salaries, job dissatisfaction, and lack of administrative support and influence over decision-making. Recently, the increased interest in teacher quality has been the topic of debate for policy-makers, the public, and the educational community. The purpose of this study was to determine if a nontraditional teacher preparation program, the Transition To Teaching program, was a viable way to ease the teacher shortages in a high poverty, urban U.S. school district, and at the same time, to evaluate the impact of teacher training on students' academic achievement. The results of this study afford evidence that the students taught by 1st-year, alternatively prepared teachers achieved as well as or better than their peers taught by traditionally certified 1st-year teachers, according to student achievement in mathematics, specifically Algebra I. (Contains 5 tables, 1 figure and 3 notes.)