Since the end of World War II and the beginning of the Cold War, public education has been high on the national agenda. The nation's need for human capital and the need to provide equality of educational opportunity to all children and youth without regard to their race, ethnicity, or social status are the two needs that then framed education…

Background: A critical issue in academic assessment is the effect of children's language and culture on their measured performance. Research on this topic has rarely focused on science education, because science is commonly (though erroneously) assumed to be "culture free." Students' scientific understandings are influenced by the cultural values,…