This article describes the development and field test of an instrument, the Views on Science and Education Questionnaire, designed to measure participants' concepts of the nature of science (NOS) and relevant teaching attitudes. The questionnaire includes 15 questions, each followed by several items representing different philosophical positions. Participants rank each item on a five-point scale. The items were empirically based and described from the learners' perspectives, but the issues and subcategories covered were validated by a panel of experts. The latest version was administered to 302 college students. Combined conceptions and conflicting thoughts about NOS were detected. Furthermore, the instrument achieved a test-retest correlation coefficient of 0.82. The questionnaire is a valid and practical tool that can be used to determine participants' conceptions and attitudes toward teaching NOS. With this instrument, science educators and teachers can conduct comparison studies and relate views of NOS to other measurable educational outcomes.