The study was designed to assess the effects of Intermediate Science Curriculum Study (ISCS) Level One in terms of (1) fostering positive growth in the scientific attitudes associated with the nature of scientific laws, the limitations of science, and the desirability of science as a vocation; (2) enhancing the self-reliance level; and (3) elevating the relative ranking given by students to science as compared to other subjects. Responses were collected from more than 650 seventh-grade students in 15 ISCS Level One classrooms. Two hundred non-ISCS seventh-grade students formed the control group. Discriminant analysis revealed that the ISCS group experienced significantly greater positive increase in the attitude associated with the nature of scientific laws than did the non-ISCS group. Both groups experienced a slight, but not significant, increase in the attitude associated with the limitations of science. Both groups ranked science lower, but not significantly, in the preferential ranking of classroom subjects. Both groups experienced a slight increase in self-reliance. (Author/PS)