This study is an exploratory research project to: (1) identify the concerns that beginning science and mathematics teachers have about being a new teacher; and (2) identify the perceptions that these teachers have about the effectiveness of their preservice program in relation to their concerns. Program, in this context, is defined as pedagogy coursework, content coursework, and undergraduate experiences relevant to teaching. The participants for this study consisted of 11 beginning secondary and middle school science and mathematics teachers who were involved in the Salish Project at Purdue University, a research project designed to study secondary science and mathematics preservice programs across the nation. The new teacher concerns that emerged were: class assignments, curriculum development, time management, classroom management, and presentation of the content. Curriculum development, class assignments, and presentation of content have significant implications for the secondary science and mathematics preservice program. The perceptions that emerged about the preservice program were: content course work is too specific; some of the pedagogical coursework has limited usefulness; there is a need for more field experiences; and being an undergraduate teaching assistant eases the transition in becoming a teacher. All four of these perceptions have implications for the improvement of a secondary science preservice program.