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1.
The high attrition rate among science, technology, engineering, and mathematics (STEM) majors has long been an area of concern for institutions and educational researchers. The transition from introductory to advanced courses has been identified as a particularly “leaky” point along the STEM pipeline, and students who struggle early in an introductory STEM course are predominantly at risk. Peer-tutoring programs offered to all students in a course have been widely found to help STEM students during this critical transition, but hiring a sufficient number of tutors may not be an option for some institutions. As an alternative, this study examines the viability of an optional peer-tutoring program offered to students who are struggling in a large-enrollment, introductory biology course. Struggling students who regularly attended peer tutoring increased exam performance, expert-like perceptions of biology, and course persistence relative to their struggling peers who were not attending the peer-tutoring sessions. The results of this study provide information to instructors who want to design targeted academic assistance for students who are struggling in introductory courses.  相似文献   

2.
Abstract

This study investigated the effect of satellite‐delivered instruction on student achievement and attitude in a high school anatomy and physiology course. The experimental group included students from seven high schools enrolled in the satellite‐delivered course. The control group consisted of students from seven high schools in which classroom teachers provided instruction. An experimental versus control matched‐pair design was used in the study. Two hypotheses were tested using the t test for dependent samples. The findings show that there was no significant difference between the experimental group and control group in attitude toward anatomy and physiology. However, on the achievement test, the mean post‐test score of the experimental group was significantly higher than that of the control group.  相似文献   

3.
The logic underlying inclusive STEM high schools (ISHSs) posits that requiring all students to take advanced college preparatory STEM courses while providing student‐centered, reform‐oriented instruction, ample student supports, and real‐world STEM experiences and role models will prepare and inspire students admitted on the basis of STEM interest rather than prior achievement for postsecondary STEM. This study tests that logic model by comparing the high school experiences and achievement of students in ISHSs and comparison schools in North Carolina. After identifying ISHS and non‐STEM comparison high schools serving students who were similar in terms of socioeconomic status and academic achievement prior to high school entry, we employed propensity‐score weighting and HLM modeling to estimate the impact of attending an ISHS on a set of outcome measures obtained from student surveys and from the state's longitudinal student data system. Analyses of student survey data found that attending an ISHS raises the likelihood that a student will complete pre‐calculus or calculus and chemistry in high school, leads to increased involvement in STEM extracurricular and out‐of‐class activities, and enhances interest in science careers and aspirations to earn a master's or higher degree. Analyses of student outcome data from state administrative records revealed a positive impact of inclusive STEM high school attendance on grade point average (GPA) but not on ACT scores. © 2016 The Authors. Journal of Research in Science Teaching Published by Wiley Periodicals, Inc. J Res Sci Teach 53: 709–736, 2016
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4.
This research investigated the effect of reflective discussions following inquiry‐based laboratory activities on students' views of the tentative, empirical, subjective, and social aspects of nature of science (NOS). Thirty‐eight grade six students from a Lebanese school participated in the study. The study used a pretest–posttest control‐group design and focused on collecting mainly qualitative data. During each laboratory session, students worked in groups of two. Later, experimental group students answered open‐ended questions about NOS then engaged in reflective discussions about NOS. Control group students answered open‐ended questions about the content of the laboratory activities then participated in discussions of results of these activities. Data sources included an open‐ended questionnaire used as pre‐ and posttest, answers to the open‐ended questions that experimental group students answered individually during every session, transcribed videotapes of the reflective discussions of the experimental group, and semi‐structured interviews. Results indicated that explicit and reflective discussions following inquiry‐based laboratory activities enhanced students' views of the target NOS aspects more than implicit inquiry‐based instruction. Moreover, implicit inquiry‐based instruction did not substantially enhance the students' target NOS views. This study also identified five major challenges that students faced in their attempts to change their NOS views. © 2010 Wiley Periodicals, Inc. J Res Sci Teach 47: 1229–1252, 2010  相似文献   

5.
Laboratory instruction is critical to the understanding of biology and is a central piece of biological sciences instruction. Although much investigation has focused on the content of biology laboratory exercises, we contend that understanding the extent to which the laboratory materials can aid or limit experimental investigation is of equal importance. In this study, therefore, we investigate the role of timing and availability of laboratory equipment in the context of two different laboratory exercises. We use both case study and an experimental approach to investigate how laboratory materials guide the planning, context, creativity, and timing of ideas shared among students. Our data support the notion that providing students with laboratory equipment before students plan and consider different experimental approaches can constrain students' ideas and encourage tool‐focused solutions to experimental design tasks. © 2011 Wiley Periodicals, Inc. J Res Sci Teach 48: 1010–1025, 2011  相似文献   

6.
Visual instruction complementing verbal lectures is known to promote learning among students. In this study, the role of visual instruction in engaging learners effectively via the simplification of technical concepts was examined. Different aspects of visualisation, such as order of presenting and dimensionality, were tested to observe their effect on students’ approach to learning and learning outcomes. In this mixed‐method quasi‐non‐experimental explanatory study, visual instruction was applied in one of the undergraduate architecture modules that teaches fundamentals of building systems, which students often find difficult to comprehend. Three key variables, including spatial cognitive ability, approach to learning and learning outcomes, were measured using statistically valid instruments along with students’ feedback and interviews. These factors were also measured for the control group that did not receive visual instruction (n = 32), to assess the effect of the intervention. When taught with visualisation, students (n = 69), showed a significant increase in deep approach to learning (e.g., deep motive: t = 2.584, p = 0.011). In interviews, students expressed a deeper interest in the subject and reported that the topic was engaging in class. Visualisation favours students with a higher spatial ability and, thus, is useful for design students who receive spatial ability training in the course. Two‐dimensional visuals must be followed and preceded by three‐dimensional visuals to provide advanced organisation and the connection of new knowledge with known organisational models to be made.  相似文献   

7.
Inclusive STEM high schools (ISHSs) can be viewed as opportunity structures for students underrepresented in STEM. By opportunity structures, we mean an education that provides not only access to high quality STEM curriculum and instruction or “opportunity to learn,” but also the capacity to create learning environments where students can build STEM social capital and the dispositions, knowledge, skills, and networks to be successful in STEM college majors and careers. This is a cross‐case analysis of case studies that describe the design and implementation of eight “exemplar” ISHSs. Beginning with 10 hypothesized critical components, we found evidence for all 10, but present in unique patterns of prominence, depending on the school context. Further inductive analysis located an additional four emergent critical components that complete the picture of how these successful ISHSs were able to achieve their goals. Importantly, across schools, four components stood out as foundational: a flexible and autonomous administrative structure; a college‐preparatory, STEM‐focused curriculum for all; well‐prepared STEM teachers and professionalized teaching staffs; and supports for students in underrepresented groups. Although many of the critical components found in the ISHSs are also found in the school reform literature, these schools also had characteristics unique to STEM education. This paper is important in understanding STEM high schools as opportunity structures and as a school reform alternative that can help solve equity and social mobility gaps in STEM.  相似文献   

8.
Being able to understand and evaluate arguments in different modalities and in different disciplines is thought to be a key component of students’ academic success in college. However, many students do not receive explicit instruction in the basic concepts and rules of argumentation. Using a difference-in-differences approach with a multicohort longitudinal data set of almost 15,000 undergraduates beginning in health and science, technology, engineering, and mathematics (STEM)-related fields at a research university, we examined changes in relative performance of students after enrolling in an introductory logic course. We find that students improved their grade point average (GPA) after taking the course, especially if they begin college with low academic achievement (Cohen’s d?=?0.18). Our results are consistent with the idea that acquiring foundational skills, in particular general skills in argumentation, prepares STEM students for future learning.  相似文献   

9.
Models of support for students with disability and learning difficulties in mainstream classes in Australia rely extensively on teacher assistants (TAs). Current models, however, inadvertently perpetuate low expectations because providing TA support can be one of the most restrictive supports offered in a school [Giangreco, M. F. 2010a. “One-to-One Paraprofessionals for Students with Disabilities in Inclusive Classrooms: Is Conventional Wisdom Wrong?” Intellectual and Developmental Disabilities 48 (1): 1–13; Etscheidt, S. 2005. “Paraprofessional Services for Students with Disabilities: A Legal Analysis of Issues.” Research and Practice for Persons with Severe Disabilities 30(2): 60–80]. In addition, the increasing instructional role of TAs in the classroom is concerning. Negative outcomes for students where TAs provide support have been noted [Giangreco, M. F., J. C. Suter, and M. B. Doyle. 2010. “Paraprofessionals in Inclusive Schools: A Review of Recent Research.” Journal of Educational and Psychological Consultation 20: 41–57; Webster, R., P. Blatchford, and A. Russell. 2010. “Should Teaching Assistants Have a Pedagogical Role? Lessons Following the DISS Project.” Paper Presented at the BERA annual conference, September 1–4, University of Warwick, UK]. A qualitative case study was conducted in an Australia city over three years across four primary school sites to identify the issues and propose possible solutions. The study identified five different models of TA support and deployment. It was found support models used in mainstream schools were generally inequitable – if students did not have a disability or learning difficulty they received instruction primarily from a qualified teacher, but if students had a disability or learning difficulty, they received instruction from a TA who may have had no qualifications, no involvement in planning, limited supervision and unclear reporting; and no clear duty statement requirements. A more inclusive and more equitable model of TA support is discussed.  相似文献   

10.
Graduate teaching assistants (GTAs) are gaining increasing responsibility for the instruction of undergraduate science students, yet little is known about their beliefs about science pedagogy or subsequent classroom practices. This study looked at six GTAs who were primary instructors in an introductory biology laboratory course. Teaching assistants taught a lesson about the potential social, health, and environmental impacts of genetically modified crops. Through classroom observations and in‐depth interviews, the researchers examined how instructors chose to frame their lessons and what GTAs perceived as important for students to know about this particular socioscientific issue (SSI). Results showed a disconnect between the relatively mature conceptualizations of effective SSI instruction that emerged during interviews and classroom practice.  相似文献   

11.
Several student and course characteristics were examined in relation to student ratings of instruction. Students at a major Canadian university completed the Universal Student Ratings of Instruction instrument at the end of every course over a three‐year period, providing 371,131 student ratings. Analyses of between‐group differences indicate that students who attend class often and expect high grades provide high ratings of their instructors (p < .001). In addition, lab‐type courses receive higher ratings than lectures or tutorials, and courses in the social sciences receive higher ratings than courses in the natural sciences (p < .001). Regression analyses indicated, however, that student and course characteristics explain little variance in student ratings of their instructors (<7%). It is concluded that student ratings are more related to teaching instruction and behavior of the instructor than to these variables.  相似文献   

12.
Active‐learning labs for two topics in high school biology were developed through the collaboration of high school teachers and university faculty and staff and were administered to 408 high school students in six classrooms. The content of instruction and testing was guided by State of Texas science objectives. Detailed teacher records describing daily classroom activities were used to operationalize two types of instruction: active learning, which used the labs; and traditional, which used the teaching resources ordinarily available to the teacher. Teacher records indicated that they used less independent work and fewer worksheets, and more collaborative and lab‐based activities, with active‐learning labs compared to traditional instruction. In‐class test data show that students gained significantly more content knowledge and knowledge of process skills using the labs compared to traditional instruction. Questionnaire data revealed that students perceived greater learning gains after completing the labs compared to covering the same content through traditional methods. An independent questionnaire administered to a larger sample of teachers who used the lab‐based curriculum indicated that they perceived changing their behaviors as intended by the student‐centered principles of the labs. The major implication of this study is that active‐learning–based laboratory units designed and developed collaboratively by high school teachers and university faculty, and then used by high school teachers in their classrooms, can lead to increased use of student‐centered instructional practices as well as enhanced content knowledge and process learning for students. © 2007 Wiley Periodicals, Inc. J Res Sci Teach 44: 960–979, 2007  相似文献   

13.
Science, technology, engineering and mathematics (STEM) education is a critical component of federal policymakers' agendas. Out-of-school time (OST) programs are designated as an important venue to teach STEM to K–12 students. Using a sample of OST direct staff in Pennsylvania (n = 133), the present analysis examines instructional methods used for STEM lessons and then explores the comfort level that staff have teaching STEM. About 20% or more of staff are not comfortable teaching STEM, depending on the subject. Multivariate analyses (Mann-Whitney tests) also show that staff with fewer STEM credentials, and who work in less-networked programs, or programs with less STEM instruction overall, are more likely to express discomfort teaching STEM. Policy and planning implications are discussed.  相似文献   

14.
ABSTRACT

Graduate students regularly teach undergraduate STEM courses and can positively impact students’ understanding of science. Yet little research examines graduate students’ knowledge about nature of science (NOS) or instructional strategies for teaching graduate students about NOS. This exploratory study sought to understand how a 1-credit Teaching in Higher Education course that utilised an explicit, reflective, and mixed-context approach to NOS instruction impacted STEM graduate students’ NOS conceptions and teaching intentions. Participants included 13 graduate students. Data sources included the Views of Nature of Science (VNOS-Form C) questionnaire administered pre- and post-instruction, semi-structured interviews with a subset of participants, and a NOS-related course project. Prior to instruction participants held many alternative NOS conceptions. Post-instruction, participants’ NOS conceptions improved substantially, particularly in their understandings of theories and laws and the tentative nature of scientific knowledge. All 12 participants planning to teach NOS intended to use explicit instructional approaches. A majority of participants also integrated novel ideas to their intended NOS instruction. These results suggest that a teaching methods course for graduate students with embedded NOS instruction can address alternative NOS conceptions and facilitate intended use of effective NOS instruction. Future research understanding graduate students' NOS understandings and actual NOS instruction is warranted.  相似文献   

15.
Elements of instructional design such as explicitly stated objectives, reviews, examples, questions, and feedback were incorporated into the laboratory manual and instruction for a unit on kinetics in a college laboratory course. This treatment (high structure) was given to five sections of students (N = 109), while a laboratory manual and instructions that emphasized informational content without the use of these design strategies (low structure) was given to another five sections (N = 108) taught by the same instructors. The students receiving the additional structure scored significantly higher on a quiz, took less time to solve a set of laboratory problems, and felt more satisfied with the instruction provided. There were no differences between groups in their comfort with the knowledge acquired. There were no interactions with performance outcomes, but several occurred for attitudes, treatments, and personality measures. The more conforming the students, the more satisfied they were with the instruction in the high-structured group and the less they liked it in the low-structured group. The more motivated the students, the more they liked the instruction in the high-structure treatment, and even more in the low-structure group. There was also a complex interaction among treatment, anxiety, ability, and treatment satisfaction.  相似文献   

16.
Can engaging college students in client-centered projects in science, technology, engineering, and mathematics (STEM) coursework increase interest in STEM professions? The current study explored the effectiveness of project-based learning (PjBL) courses on student attitudes, major choice, and career aspirations in STEM. Framed in expectancy-value and social cognitive career choice models, we examined the effect of engaging in at least one authentic, project-based course during the first four semesters of college on student STEM attitudes and career aspirations in a quasi-experimental study with a sample of (N = 492) natural science and engineering students. STEM self-efficacy and subjective task value variables (STEM attainment, intrinsic and utility value of STEM courses, and relative cost associated with engaging in STEM courses) were examined as mediators of the relationship between classroom project-based experiences and STEM career aspirations. Gender and underrepresented minority status were also examined. We found that engaging in at least one project-based course during the first four semesters affected student perceptions of STEM skills, perceptions of the utility value of participating in STEM courses, and STEM career aspirations. Furthermore, we found that the effect of project-based courses on STEM career aspirations was mediated by STEM skills and perceptions of course utility. The effect of PjBL was not moderated by race or gender. We highlight areas of future research and the promise of PjBL for engaging students in STEM professions.  相似文献   

17.
Abstract. This 3‐year Model Demonstration Project involved the development and field testing of an individualized course‐specific strategy instruction model with college students with learning disabilities and Attention Deficit Hyperactivity Disorder (ADHD). The 46 participants received individualized semester‐long strategy instruction by graduate students in special education. A variety of data sources were used to evaluate the implementation of the model as well as the academic success of students who received individualized strategy instruction. Quantitative analyses indicated that the group as a whole as well as the subset of students on probation and suspension significantly improved their grades and sustained this improvement over time. Qualitative analysis identified two factors related to improvement: independent use of strategies and the supportive nature of the strategy instructor–student relationship. Qualitative analysis also identified two factors related to nonimprovement: academic/cognitive skill deficits and emotional/medication‐related issues. Implications of the model for postsecondary education and suggestions for future research are discussed.  相似文献   

18.
We analyze longitudinal data from students who spent their academic careers in North Carolina (NC) public secondary schools and attended NC public universities to investigate the importance of high school racial composition and opportunities to learn in secondary school for choosing a science, technology, engineering, and mathematics (STEM) major. We consider school racial composition and opportunities to learn as contexts that shape students' decisions regarding college majors. Results of cross‐classified hierarchical logistic models indicate that attending schools with predominantly White students is negatively associated with declaring a STEM major and with graduating with a STEM major irrespective of students' own race. The finding suggests that for students in North Carolina, attending racially isolated White high schools is related to a decrease in adolescents' participation in STEM during college.  相似文献   

19.
This study investigated the use of a hands-on laboratory program as a means of improving student attitude toward science and increasing student achievement levels in science knowledge. Using a posttest-only control group design, curriculum referenced objective examinations were used to measure student achievement in science knowledge, and a posttest Q-sort survey was used to measure student attitude toward science. A one-way analysis of variance compared the groups' differences in achievement and attitude toward science. Analysis of covariance was used to determine the effect of the laboratory treatment on the dependent achievement variable with attitude toward science as the covariable. The findings showed that students who had regular laboratory instruction (a) scored significantly higher (p < .01) on the objective examination of achievement in science knowledge than those who had no laboratory experiences; (b) exhibited a moderate, positive correlation (r = .406) between their attitude toward science and their achievement; and (c) scored significantly higher (p < .01) on achievement in science knowledge after these scores were adjusted on the attitude toward science covariable. There were no significant differences in achievement or attitude toward science for the limited English proficiency groups. It was concluded that laboratory instruction influenced, in a positive direction, the students' attitude toward science, and influenced their achievement in science knowledge. It was recommended that science instruction include a regular laboratory experience as a demonstrated viable and effective instructional method for science teachers. This model of science instruction has been shown to be effective with students of diverse backgrounds who live within large urban centers. J Res Sci Teach 34: 343–357, 1997.  相似文献   

20.
We developed a rubric for measuring students' ability to reason and write scientifically. The Rubric for Science Writing (Rubric) was tested in a variety of undergraduate biology laboratory courses (total n = 142 laboratory reports) using science graduate students (teaching assistants) as raters. Generalisability analysis indicates that the Rubric provides a reliable measure of students' abilities (g = 0.85) in these conditions. Comparison of student performance in various biology classes indicated that some scientific skills are more challenging for students to develop than others and identified a number of previously unappreciated gaps in the curriculum. Our findings suggest that use of the Rubric provides three major benefits in higher education: (1) to increase substance and consistency of grading within a course, particularly those staffed by multiple instructors or graduate teaching assistants; (2) to assess student achievement of scientific reasoning and writing skills; and (3) when used in multiple courses, to highlight gaps in alignment among course assignments and provide a common metric for assessing to what extent the curriculum is achieving programmatic goals. Lastly, biology graduate students reported that use of the Rubric facilitated their teaching and recommended that training on the Rubric be provided to all teaching assistants.  相似文献   

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