The results of the achievement testing program of the Alberta (Canada) public schools are reported for the June 1991 administrations. The 1991 results help demonstrate what is possible for students in grades 3, 6, and 9 to know and do in science, mathematics, and social studies. For the first time, results are reported in terms of curriculum standards, achievement standards, and assessment standards. Achievement standards state how many students are expected to reach a particular curriculum level at a specific age or year in school. Assessment standards are the scores to be achieved by a student on a specific test or part of a test before the performance of that student is judged acceptable or excellent. Achievement and assessment standards are reported for each major component of the tests and for both components together. Results are separately reported for grade 3 science, grade 6 mathematics, and grade 9 social studies. Achievement is also discussed by gender, age, grade level, and over time. The broadened assessment practices that Alberta is initiating are described, and field tests of these portfolio and performance-based assessments are reviewed. Thirty-eight tables present test data, and 17 figures illustrate achievement. Appendices provide two figures, three tables, information on test interpretation for parents and the community, and information about developing tests. A questionnaire about the report is included for reader feedback. (SLD)