Supplemental instruction in chemistry

This study was designed to measure some effects of supplemental instruction in chemistry. Supplemental instruction is a peer-led cooperative learning program that encourages students to develop conceptual understanding by articulating both understandings and misconceptions in a think-aloud fashion. Supplemental instruction was offered three hours weekly outside of class and lab time for students in four classes of General Organic and Biological Chemistry. Over a two-year period 108 students volunteered to participate in this program; 45 students did not participate. As measured by final grades in chemistry and responses to a questionnaire, supplemental instruction was effective in increasing students' achievement in chemistry. Further research is needed to determine the in-depth effects of supplemental instruction on students' learning, problem solving, and self-esteem.     

Concept maps as a heuristic for science curriculum development: Toward improvement in process and product

This article outlines the use of concept maps as a tool for science curriculum development and discusses the changes that occur in the teacher's view of the curriculum with successive revisions of the maps. Although we have used concept mapping in curriculum development with teachers from grades 4–8, we describe in detail the maps created by sixth-grade teachers. We analyzed the maps using three criteria: hierarchical structure, progressive differentiation, and integrative reconciliation. Changes made to the maps during the revision process, including additions and deletions, show increased clarification of both the concepts to be learned and the connections between them. Consecutive map revisions show the development of a cohesive conceptual grade-six science curriculum. The use of concept maps can help science teachers develop science curriculum that is hierarchically arranged, integrated, and conceptually driven.     

在数学教学中如何加强数学语言教育

本文从数学语言与数学符号、数学符号与数学概念的关系出发，就如何加强数学语言教育提出几点建议。     

Phonological awareness,verbal working memory and the acquisition of literacy

This paper describes a 2-year longitudinal study of 76 initially prereading children. The study examined the relationships between phonological awareness (measured by tests of onset and rime, phonemic segmentation and phoneme deletion), verbal working memory and the development of reading and spelling. Factor analyses showed that the verbal working memory tests which were administered loaded on two distinct but highly related factors, the first of which,simple repetition, involved the repetition of verbal items exactly as spoken by the experimenter, whereas the second,backwards repetition, involved repetition of items in reverse order. Factor analyses also showed that, whist the phonological awareness variables consistently loaded on the backwards repetition factor at the beginning and end of Grade 1, by Grade 2 the phonological awareness variables loaded on a separate factor which also included sentence repetition. Results of multiple regression analyses, with reading and spelling as a compound criterion variable, indicated that phonological awareness consistently predicted later reading and spelling even when both simple and backwards repetition were controlled. In contrast, verbal working memory did not consistently predict reading and spelling across testing times. Whilst there was some indication that verbal working memory, especially backwards repetition, measured during Grade 1 did predict reading and spelling in Grade 2, these effects were no longer evident when all three phonological variables were controlled. Nevertheless, with 4 individual reading and 2 individual spelling measures as the criterion variables, it was shown that phonological awareness was not quite such a consistent predictor of reading and spelling: it was most highly related to reading pseudowords and spelling real words; but it was not so highly related to spelling pseudowords, apparently because the processing demands of the task for the young children in the study were extremely high. Given the importance of verbal working memory for the completion of phonological awareness, reading and spelling tasks, in particular for spelling pseudowords, the findings are interpreted as providing some support for a theoretical position which posits that both phonological awareness and verbal working memory contribute to the early stages of literacy acquisition. Whilst the findings suggest some support for a general underlying phonological ability, there is also evidence that, as children learn to read and write, verbal working memory and phonological awareness become more differentiated.     

Examining Hispanic Student Mathematics Performance on High-Stakes Tests: An Examination of One Urban School District in Colorado

Hispanic students, born both inside and outside the United States, comprise over 80% of the US English language learner population. The difference in mathematics achievement among Hispanic students and other populations has been well documented. As a result, it is important to understand the effects of using standards-based mathematics curriculum with high school Hispanic students. Mathematics achievement scores from the Colorado Student Assessment Program and Measurement of Academic Progress for Hispanic 9th and 10th grade students (n = 1,318) who used the Core-Plus Mathematics Program were compared to the progress of other student demographics (n = 2,003) who used the same curriculum. In following the recommendations of the National Research Council (On evaluation curricular effectiveness: judging the effectiveness of K-12 mathematics evaluations. National Academies Press, Washington, DC 2005), a meta-analysis (Glass in Educ Res 5:3–8, 1976) of Hispanic students using National Science Foundation Funded (NSFF) curricula was conducted to contextualize this study’s findings within the findings of previous studies. The results of this study indicated that Hispanic students have shown modest gains; however, their relative position compared to other ethnic groups is unremarkable. The meta-analysis Cohen’s d results ranged from +.673 (SE = .131) to −.670 (SE = .045) with slightly positive effects for Hispanic students using an NSFF curriculum when compared to those not using an NSFF curriculum (.043, SE = .012).     

论北宋词的文人抒怀与自况式用典

词至北宋逐渐走向成熟,进入词体发展的黄金时期,词中的用典也随之普及。北宋文人善于在词中以典故自况,并借此强化词中的自我身份意识,进而以文人惯用的典雅方式自抒情怀。这是词发展为与诗相似的自我抒怀性文学样式的一个重要体现,苏轼、贺铸、周邦彦、秦观等北宋著名词人都在各自的人生经历、词体观念的基础上积极地进行着探索性的拓展。     

An examination of the relationship between technology problems and teaching evaluation of online instruction

To address faculty members' concern that teaching evaluation in the online environment might be lowered because of technology problems students experience in online courses, a sample of 202 undergraduate students enrolled in an introductory statistics course in a college of business administration was surveyed. Students' evaluation of their instructors and the course and their experiences with technology problems when taking the course were measured. As expected, a negative correlation between teaching evaluation and experience of technology problems was observed. Based on the finding, it is suggested that, to encourage faculty members to teach online, universities need to examine the relationship between teaching evaluation and technology problems experienced by students in the online environment and adjust the evaluation skewed by problems that are out of instructors' control. Measurement instruments used in the study and a suggested formula for adjusting teaching evaluation are provided.     

试论小山词之妙用天气描写

晏几道时常巧妙运用天气描写,创造出奇特的艺术表达效果。用天气虚写与天气泛写之新概念从天气描写的角度分析小山词,从而对流传千古、家喻户晓之名篇警句进行新视角的解读。     

Sensory, cognitive, and linguistic factors in the early academic performance of elementary school children: The Benton-IU project

Standardized sensory, perceptual, linguistic, intellectual, and cognitive tests were administered to 470 children, approximately 96% of the students entering the first grade in the four elementary schools of Benton County, Indiana, over a 3-year period (1995--1997). The results of 36 tests and subtests administered to entering first graders were well described by a 4-factor solution. These factors and the tests that loaded most heavily on them were reading-related skills (phonological awareness, letter and word identification); visual cognition (visual perceptual abilities, spatial perception, visual memory); verbal cognition (language development, vocabulary, verbal concepts); and speech processing (the ability to understand speech under difficult listening conditions). A cluster analysis identified 9 groups of children, each with a different profile of scores on the 4 factors. Within these groups, the proportion of students with unsatisfactory reading achievement in the first 2 years of elementary school (as reflected in teacher-assigned grades) varied from 3% to 40%. The profiles of factor scores demonstrated the primary influence of the reading-related skills factor on reading achievement and also on other areas of academic performance. The second strongest predictor of reading and mathematics grades was the visual cognition factor, followed by the verbal cognition factor. The speech processing factor was the weakest predictor of academic achievement, accounting for less than 1% of the variance in reading achievement. This project was a collaborative effort of the Benton Community School Corporation and a multidisciplinary group of investigators from Indiana University.     

Transforming administration to support science in the schoolhouse for students with disabilities

I examine the role that administrators play in facilitating the development, adoption, use, and evaluation of scientifically based interventions within the school culture to support the educational outcomes of students with learning disabilities (LD). Two ways of transforming the administrative role to support science in the schoolhouse are presented; one considers the importance of including language in future legislation that acknowledges the role of administrators in school reform, and the other focuses on establishing a national research agenda addressing issues of leadership and special education. I argue that these 2 venues should serve to identify and to stimulate the use of evidence-based administrative practices that ultimately increase educational outcomes for students with LD, improve teacher instruction, and transform the leadership mission.