The results of the 1969-1970 research program for the Law in American Society Foundation, on the use of Law in American Society materials in grades five, seven, nine, and eleven, are summarized in this report. Two general questions concerning improved achievement on the concepts covered by students using the materials and more positive opinions about aspects of the law and the legal system are posed. Data collected on these questions comes from comparisons between Experimental groups and a Control group and gain scores for two different Experimental groups. After the introduction the report begins with a discussion of sampling and statistical procedures and comments on inherent problems in the research program. Then, a general statement of results summarizes the achievement and opinion changes overall, grade by grade, and includes statistical tests and graphs. Finally, the achievement tests are presented item by item with proportions of students responding correctly and comments and suggestions based on this information; and the opinion panel results, are given for each of the twenty-five items with results for all of the grades on a single graph and comments about individual items and grouped items. (Author/JH)