A quasi-experimental design with two experimental groups and one control group was used to evaluate the use of two books in the Quantitative Literacy Series, "Exploring Data" and "Exploring Probability." Group X teachers were those who had attended a workshop on the use of the materials and were using the materials during the 1986-1987 school year. Group Y teachers were those who were trained by the Group X teachers and were using the materials during the 1986-1987 school year. Teachers of Group Z, the control group, were teaching similar classes from the same schools as teachers of Groups X and Y. A pretest was administered to all three groups in November, 1986. A March Test was administered to the two experimental groups. A May Test, posttest, was administered to all three groups. In addition, teachers maintained daily logs of the amount of instructional time allocated to mathematics and the amount of instructional time allocated to the Quantitative Literacy materials. All teachers were requested to complete a questionnaire at the end of the study. The results indicate that using the Quantitative Literacy materials resulted in students learning approaches and techniques for describing data sets and means of computing probabilities. (Author/PK)