NAEP 1992 trends in academic progress [microform] : achievement of U.S. students in science, 1969 to 1992 : Mathematics, 1973 to 1992 : reading, 1971 to 1992 : writing, 1984 to 1992 / Ina V.S. Mullis ... [et al.] ; prepared by Educational Testing Service under contract with the National Center for Education Statistics