Science knowledge and cognitive strategy use among culturally and linguistically diverse students

Science performance is determined, to a large extent, by what students already know about science (i.e., science knowledge) and what techniques or methods students use in performing science tasks (i.e., cognitive strategies). This study describes and compares science knowledge, science vocabulary, and cognitive strategy use among four diverse groups of elementary students: (a) monolingual English Caucasian, (b) African-American, (c) bilingual Spanish, and (d) bilingual Haitian Creole. To facilitate science performance in culturally and linguistically congruent settings, the study included student dyads and teachers of the same language, culture, and gender. Science performance was observed using three science tasks: weather phenomena, simple machines, and buoyancy. Data analysis involved a range of qualitative methods focusing on major themes and patterns, and quantitative methods using coding systems to summarize frequencies and total scores. The findings reveal distinct patterns of science knowledge, science vocabulary, and cognitive strategy use among the four language and culture groups. The findings also indicate relationships among science knowledge, science vocabulary, and cognitive strategy use. These findings raise important issues about science instruction for culturally and linguistically diverse groups of students.     

The challenge of altering elementary school teachers' beliefs and practices regarding linguistic and cultural diversity in science instruction

This study examined the impact of a professional development intervention aimed at helping elementary teachers incorporate elements of students' home language and culture into science instruction. The intervention consisted of instructional units and materials and teacher workshops. The research involved 43 third‐ and fourth‐grade teachers at six elementary schools in a large urban school district. These teachers participated in the intervention for 2 consecutive years. The study was conducted using both quantitative and qualitative methods based on focus group interviews, a questionnaire, and classroom observations. The results indicate that as teachers began their participation in the intervention, they rarely incorporated students' home language or culture into science instruction. During the 2‐year period of the intervention, teachers' beliefs and practices remained relatively stable and did not show significant change. Possible explanations for the limited effectiveness of the intervention are addressed, and implications for professional development efforts are discussed. © 2007 Wiley Periodicals, Inc. J Res Sci Teach 44: 1269–1291, 2007     

Measuring instructional congruence in elementary science classrooms: Pedagogical and methodological components of a theoretical framework

This article is situated within a theoretical framework, instructional congruence, articulating issues of student diversity with the demands of academic disciplines. In the context of a large‐scale study targeting elementary school science, the article describes a research instrument that aims to combine the strengths of both quantitative and qualitative approaches to classroom data. The project‐developed classroom observation guideline is a series of detailed scales that produce numerical ratings based on qualitative observations of different aspects of classroom practice. The article's objectives are both pedagogical and methodological, reflecting the dual functionality of the instrument: (a) to concretize theoretical constructs articulating academic disciplines with student diversity in ways that are useful for rethinking classroom practice; and (b) to take advantage of the strengths of qualitative educational research, but within a quantitative analytical framework that may be applied across large numbers of classrooms. © 2006 Wiley Periodicals, Inc. J Res Sci Teach 44: 424–447, 2007     

Using a Taxonomy of Differential Step Functioning to Improve the Interpretation of DIF in Polytomous Items: An Illustration

The assessment of differential item functioning (DIF) in polytomous items addresses between-group differences in measurement properties at the item level, but typically does not inform which score levels may be involved in the DIF effect. The framework of differential step functioning (DSF) addresses this issue by examining between-group differences in the measurement properties at each step underlying the polytomous response variable. The pattern of the DSF effects across the steps of the polytomous response variable can assume several different forms, and the different forms can have different implications for the sensitivity of DIF detection and the final interpretation of the causes of the DIF effect. In this article we propose a taxonomy of DSF forms, establish guidelines for using the form of DSF to help target and guide item content review and item revision, and provide procedural rules for using the frameworks of DSF and DIF in tandem to yield a comprehensive assessment of between-group measurement equivalence in polytomous items.     

Teachers' perceptions of policy influences on science instruction with culturally and linguistically diverse elementary students

This study asked elementary school teachers how educational policies affected their science instruction with a majority of English language learners. The study employed a questionnaire followed by focus group interviews with 43 third and fourth grade teachers from six elementary schools in a large urban school district with high populations of English language learners in the southeastern United States. Results indicate that teachers' opinions concerning all areas of policy evolved as the state enforced stronger measures of accountability during the 2‐year period of the study. Although relatively positive regarding standards, their opinions became increasingly negative regarding statewide assessment, and even more so toward accountability measured by reading, writing, and mathematics. The results suggest that it is important to understand how teachers perceive the influence of policies, particularly those relating to English language learners, as science accountability becomes more imminent across the states. © 2007 Wiley Periodicals, Inc. J Res Sci Teach 44: 725–746, 2007     

Test‐based accountability: Potential benefits and pitfalls of science assessment with student diversity

Recent test‐based accountability policy in the U.S. has involved annually assessing all students in core subjects and holding schools accountable for adequate progress of all students by implementing sanctions when adequate progress is not met. Despite its potential benefits, basing educational policy on assessments developed for a student population of White, middle‐ and upper‐class, and native speakers of English opens the door for numerous pitfalls when the assessments are applied to minority populations including students of color, low SES, and learning English as a new language. There exists a paradox; while minority students are a primary intended beneficiary of the test‐based accountability policy, the assessments used in the policy have been shown to have many shortcomings when applied to these students. This article weighs the benefits and pitfalls that test‐based accountability brings for minority students. Resolutions to the pitfalls are discussed, and areas for future research are recommended. © 2009 Wiley Periodicals, Inc. J Res Sci Teach 47: 6–24, 2010     

Impact of a multiyear professional development intervention on science achievement of culturally and linguistically diverse elementary students

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     

Integrating Science And English Proficiency For English Language Learners

Despite the expectation that all students should achieve high academic standards, content area instruction and English for speakers of other languages instruction for English language learners (ELLs) have traditionally been conceptualized as separate domains, resulting in educational inequities for ELLs. This is because effective instruction to promote academic achievement for ELLs requires integration of content and language. Such inequities are more pronounced in urban schools where ELLs are disproportionately represented. In science education, research on instructional interventions to simultaneously promote science and English proficiency of ELLs has begun to emerge in recent years. Grounded in this emerging research literature, we offer specific instructional strategies to integrate science and English proficiency for ELLs in five domains: (a) literacy strategies with all students, (b) language support strategies with ELLs, (c) discourse strategies with ELLs, (d) home language support, and (e) home culture connections.