This study examined the impact of an inquiry-based instructional intervention on (a) children's ability to conduct science inquiry overall and to use specific skills in inquiry, and (b) narrowing the gaps in children's ability among demographic subgroups of students. The intervention consisted of instructional units, teacher workshops, and classroom practices. The study involved 25 third-and fourthgrade students from six elementary schools representing diverse linguistic and cultural groups. Quantitative results demonstrated that the intervention enhanced the inquiry ability of all students regardless of grade, achievement, gender, ethnicity, socioeconomic status (SES), home language, and English proficiency. Particularly, low-achieving, low-SES, and English for Speakers of Other Languages (ESOL) exited students made impressive gains. The study adds to the existing literature on designing learning environments that foster science inquiry of all elementary students. ß

This research examined the impact of the first‐year implementation of an instructional intervention to promote achievement and equity in science and literacy for culturally and linguistically diverse elementary students. The research addressed three areas: (a) overall science and literacy achievement, (b) achievement gaps among demographic subgroups, and (c) comparison with national (NAEP) and international (TIMSS) samples of students. The research involved 1,523 third‐ and fourth‐grade students at six elementary schools in a large urban school district. Significance tests of mean scores between pre‐ and posttests indicate statistically significant increases on all measures of science and literacy at both grade levels. While achievement gaps widened with third graders on some of the measures, the gaps tended to narrow with fourth graders. The results based on item‐by‐item comparisons with NAEP TIMSS samples of students indicated overall positive performance of the students in the research at the end of the school year. © 2005 Wiley Periodicals, Inc. J Res Sci Teach 42: 857–887, 2005

This study examined the impact of the 3‐year implementation of a professional development intervention on science achievement of culturally and linguistically diverse elementary students. Teachers were provided with instructional units and workshops that were designed to improve teaching practices and foster positive beliefs about science and literacy with diverse student groups. The study involved third, fourth, and fifth grade students at six elementary schools in a large urban school district during the 2001 through 2004 school years. Significance tests of mean scores between pre‐ and posttests indicated statistically significant increases each year on all measures of science at all three grade levels. Achievement gaps among demographic subgroups sometimes narrowed among fourth grade students and remained consistent among third and fifth grade students. Item‐by‐item comparisons with NAEP and TIMSS samples indicated overall positive performance by students at the end of each school year. The consistent patterns of positive outcomes indicate the effectiveness of our intervention in producing achievement gains at all three grade levels while also reducing achievement gaps among demographic subgroups at the fourth grade. © 2008 Wiley Periodicals, Inc. J Res Sci Teach 45: 726–747, 2008

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, experiences, and epistemologies of their home communities. Efforts to minimize cultural bias include designing tests to be “culturally neutral” and, conversely, tailoring assessments to specific cultural groups; both approaches are theoretically and practically problematic. Several studies have focused on testing accommodations for English language learners (ELLs), but accommodations raise validity and feasibility issues and are limited by “English-only” policies. This article stresses the linkages between language and culture, drawing on contemporary literacy theory and research on scientific communities as well as groups traditionally marginalized from science. Objective To examine how children's prior linguistic and cultural knowledge mediates their engagement with school science, as reflected in their responses on science assessments. Participants Over 1,500 students from six elementary schools serving diverse populations. Research Design Project-developed assessments included items requiring students to explain scientific phenomena. Scoring revealed that students misinterpreted some items, and scorers had difficulty understanding some students’ responses. Project personnel then undertook qualitative discourse analysis of responses on all tests. Findings Analysis revealed phonological/orthographic and semantic interference from students’ home languages; responses reflecting students’ cultural beliefs and practices; and “languacultural” features related to genre, authorial voice, pragmatic framing, and textual organization. Conclusions/Recommendations Science tests inevitably contain tacit cultural and linguistic knowledge that is not equally accessible to all students. Using “real-life scenarios” in assessment items may confuse students whose lives do not reflect mainstream norms. Furthermore, English-medium assessments are unlikely to accurately measure ELLs’ science knowledge. Teachers can learn to recognize factors that impede ELLs from grasping or expressing science concepts clearly. They should also ensure that all students understand the discursive and textual conventions inherent in assessment instruments. Linguistic and cultural factors shape science knowledge not only of students but of teachers, scientists, and test developers. Uncovering the factors shaping students’ academic performance requires fine-grained qualitative analysis and collaboration across disciplinary boundaries.