The literature on teachers' unions is relatively silent about the role of union strength in affecting important outcomes, due in large part to the difficulty in measuring union strength. In this article, we illustrate a method for obtaining valid, reliable, and replicable measures of union strength through the use of a Partial Independence Item…

This article describes the construction of instruments for evaluating statistics texts that are grounded in the statistical education and text evaluation literatures. Student, instructor, and expert evaluator instruments were piloted with 36 graduate students and 5 faculty members. Results suggest the usefulness of the developed instruments. (SLD)