| Abstract: | Science educators have claimed that well-conceived instructional strategies and curricular sequences, emphasizing the process aspects of science, will foster an understanding of the nature of science. Furthermore, a process emphasis on science has been cited for its ability to promote logical thinking skill, develop a locus of control “shift,” and enhance science content acquisition. The intent of this investigation was to examine the purported influence and developmental nature of a science process emphasis during a given semester of study, as well as over extended curricular sequences, each sequence being representative of three recognized preservice elementary science teacher preparatory programs. Data were collected from 135 elementary preservice teachers enrolled in science teaching methods courses at the endpoint of one of three sequences: (a) introductory process instruction with three subsequent semesters of integrated science content and teaching methods, (b) process instruction with separate subsequent content and teaching methods, and (c) only science content with subsequent teaching methods. Another 29 preservice teachers, assessed prior to entry into instructional sequences, provided a cross-sectional sample for examining developmental changes in locus of control, logical thinking, nature of science, and science content knowledge. Statistical procedures included Kruskal-Wallis ANOVA and Wilcoxon tests. Results indicated that a one-semester process skills course was influential in developing a basis for science content acquisition and in fostering an understanding of the nature of science. Results further indicate that expected additional gains are significant in science content acquisition through matriculation in an extended curricular sequence. Implications for science educators are discussed. |
