Educational opportunities in the home, at school, and within the community differ across countries and affect students' achievement and future success in science fields. Bandura's Social (Social foundations of thought and action: A social cognitive theory, 1986) and Bronfenbrenner's Ecological System Theory (Ecological models of human development. In International Encyclopedia of Education, 1994) both support the notion that students' attitudes towards science and home resources can be associated with their academic achievement. In order to examine the possible home and student level factors in science achievement, we examined fourth graders' home resources and attitudes towards science in the Trends in International Mathematics and Science Study (TIMSS) 2015 in South Korea, Turkey, and the United States where students' science achievement scores varied. Findings from multiple linear regression analyses indicated that having a positive attitude toward science and more home resources positively related to fourth grade students' science scores. Among different home resources, the number of books owned at home appeared to better predict students' science scores. Providing students with science books in early grades may increase their interest in science and contribute to their science achievement in the future. Longitudinal studies of science achievement in these three countries and other countries may be included in further research.