The Fennema-Sherman Mathematics Attitudes Scales (E. Fennema and J. A. Sherman, 1976) are among the most popular measures used in studies of attitudes toward mathematics. However, the measurement integrity of the scores has not yet been established conclusively. Measurement integrity was explored by using data from 174 elementary school teachers of mathematics in an urban public school system. Both the factor structure and sensitivity to social desirability response set were investigated. Results of factor structure analysis were generally favorable with regard to the validity of scores. Although there was not a perfect fit with the model posited by the measure's authors, reasonable general correspondence was attained. Divergent construct validity coefficients were also favorable. Two tables and one figure present study findings. Appendix A presents item stems and scale classifications, and Appendix B contains the varimax rotated structure/pattern coefficients from the principal components analysis. (Author/SLD)