Different but Equal? How Nonmajors and Majors Approach and Learn Genetics

Introductory biology courses are frequently offered separately to biology majors and nonbiology majors, with the assumption that the two groups of students are different enough to merit different courses. To assess the evidence behind this assumption, we compared students in two different genetics classes at the University of Colorado–Boulder, one class for nonscience majors (nonmajors) and the other class for biology majors and students planning a biology-related career (majors), to see whether these two groups of students were fundamentally different in performance and attitudes. To measure content knowledge, we administered identical assessments to both groups of students during the semester: a validated pre- and postcontent assessment (Genetics Concept Assessment), ungraded quizzes after problem-solving sessions, and questions on each exam. We measured attitudes, study time, and study techniques through online surveys. Majors outperformed nonmajors on content assessments, finishing with significantly higher learning gains. Nonmajors and majors also differed in their motivation, interest, study time, and expert-level of beliefs. We suggest that focusing on the process of science and its connection to students'' lives will better engage and motivate nonmajors while still helping them learn the fundamental concepts of genetics.     

Students' science perceptions and enrollment decisions in differing learning cycle classrooms

This investigation examined 10th‐grade biology students' decisions to enroll in elective science courses, and explored certain attitudinal perceptions of students that may be related to such decisions. The student science perceptions were focused on student and classroom attitudes in the context of differing learning cycle classrooms (high paradigmatic/high inquiry, and low paradigmatic/low inquiry). The study also examined possible differences in enrollment decisions/intentions and attitudinal perceptions among males and females in these course contexts. The specific purposes were to: (a) explore possible differences in students' decisions, and in male and female students' decisions to enroll in elective science courses in high versus low paradigmatic learning cycle classrooms; (b) describe patterns and examine possible differences in male and female students' attitudinal perceptions of science in the two course contexts; (c) investigate possible differences in students' science perceptions according to their decisions to enroll in elective science courses, participation in high versus low paradigmatic learning cycle classrooms, and the interaction between these two variables; and (d) examine students' explanations of their decisions to enroll or not enroll in elective science courses. Questionnaire and observation data were collected from 119 students in the classrooms of six learning cycle biology teachers. Results indicated that in classrooms where teachers most closely adhered to the ideal learning cycle, students had more positive attitudes than those in classrooms where teachers deviated from the ideal model. Significantly more females in high paradigmatic learning cycle classrooms planned to continue taking science course work compared with females in low paradigmatic learning cycle classrooms. Male students in low paradigmatic learning cycle classrooms had more negative perceptions of science compared with males in high paradigmatic classrooms, and in some cases, with all female students. It appears that using the model as it was originally designed may lead to more positive attitudes and persistence in science among students. Implications include the need for science educators to help teachers gain more thorough understanding of the learning cycle and its theoretical underpinnings so they may better implement this procedure in classroom teaching. © 2001 John Wiley & Sons, Inc. J Res Sci Teach 38: 1029–1062, 2001     

Using clickers in nonmajors- and majors-level biology courses: student opinion, learning, and long-term retention of course material

Student response systems (clickers) are viewed positively by students and instructors in numerous studies. Evidence that clickers enhance student learning is more variable. After becoming comfortable with the technology during fall 2005-spring 2006, we compared student opinion and student achievement in two different courses taught with clickers in fall 2006. One course was an introductory biology class for nonmajors, and the other course was a 200 level genetics class for biology majors. Students in both courses had positive opinions of the clickers, although we observed some interesting differences between the two groups of students. Student performance was significantly higher on exam questions covering material taught with clickers, although the differences were more dramatic for the nonmajors biology course than the genetics course. We also compared retention of information 4 mo after the course ended, and we saw increased retention of material taught with clickers for the nonmajors course, but not for the genetics course. We discuss the implications of our results in light of differences in how the two courses were taught and differences between science majors and nonmajors.     

Analysis of Student Performance in Large-Enrollment Life Science Courses

This study examined the historical performance of students at Michigan State University in 12 life sciences courses over 13 yr to find variables impacting student success. Hierarchical linear modeling predicted 25.0–62.8% of the variance in students’ grades in the courses analyzed. The primary predictor of a student''s course grade was his or her entering grade point average; except for the second course in a series (i.e., Biochemistry II), in which the grade for the first course in the series (i.e., Biochemistry I) was often the best predictor, as judged by β values. Student gender and major were also statistically significant for a majority of the courses studied. Female students averaged grades 0.067–0.303 lower than their equivalent male counterparts, and majors averaged grades were 0.088–0.397 higher than nonmajors. Grades earned in prerequisite courses provided minimal predictive ability. Ethnicity and involvements in honors college or science residential college were generally insignificant.     

A program to improve elementary teacher preparation in science at Rollins College

Conclusion The goals of this project were to design and implement a series of courses that would better prepare elementary school teachers to teach science and would promote positive attitudes toward science and science teaching. The initial offering of the first series of courses met with moderate success. Although the courses fostered an increase in cognitive knowledge, the magnitude of the improvement was not what we had anticipated. There was no significant improvement in the attitudes of the students toward science or science teaching. The science course has been revised and is currently being offered for both preservice and inservice teachers. The revisions include lengthening the class time, so that the material can be covered at a more relaxed pace, and increasing the amount of active team teaching by the instructors to further emphasize the interrelations between chemistry and biology and to eliminate the fragmentation of the course. It is hoped that these changes will also have a positive impact on the students’ attitudes toward the course and thus toward science in general.     

A survey of antecedents of attitudes toward science

Relationships among attitudes of students toward science, as measured by the WASP (Wareing Attitudes Toward Science Protocol), perceived antecedents of such attitudes, and class achievement or performance indicated by reported grades were investigated for a survey sample of 1,740 students in 87 high school science classes from five communities. Additionally, students' self-reported number of tests administered in a given course, perceived rewards, degree of stress, and internal structure of the course were examined as potential predictor variables. Results indicate a significant correspondence between report card grades, degree of structure, degree of stress, gender, degree of rewards, number of tests, and students' attitudes toward science.     

Nonscience majors learning science: A theoretical model of motivation

A theoretical model of nonscience majors' motivation to learn science was tested by surveying 369 students in a large‐enrollment college science course that satisfies a core curriculum requirement. Based on a social‐cognitive framework, motivation to learn science was conceptualized as having both cognitive and affective influences that foster science achievement. Structural equation modeling was used to examine the hypothesized relationships among the variables. The students' motivation, as measured by the Science Motivation Questionnaire (SMQ), had a strong direct influence on their achievement, as measured by their science grade point average. The students' motivation was influenced by their belief in the relevance of science to their careers. This belief was slightly stronger in women than men. Essays by the students and interviews with them provided insight into their motivation. The model suggests that instructors should strategically connect science concepts to the careers of nonscience majors through such means as case studies to increase motivation and achievement. © 2006 Wiley Periodicals, Inc. J Res Sci Teach 44: 1088–1107, 2007     

A quantitative and qualitative inquiry into the attitudes toward science of nonscience college students

The attitudes toward science of nonscience college students were investigated using quantitative and qualitative forms of inquiry. Quantitative methods were used to determine (a) how attitudes toward science of nonscience college students compare with attitudes of science majors, and (b) whether attitudes toward science change with instruction. Qualitative assessment was used to investigate attitude development as it relates to science. The subjects were 102 nonscience students and 81 science students. Six attitudinal variables were investigated using the Attitudes Toward Science Inventory (ATSI) as the quantitative instrument. Hotelling's T² showed a significant difference (p = 0.0001) in attitudes between the two groups. T tests revealed significant differences between the two groups for all six variables. A significant difference (p = 0.0001) was found between pretest and posttest results for the nonscience students. T tests showed significant differences between the two sets of scores for all six variables, indicating a favorable change in attitudes. An interview questionnaire was used to investigate factors contributing to attitude development. The interview results suggested that attitudes toward science are formed by interactions of both school and nonschool variables.     

Influence of resequencing general science content on the science achievement,attitudes toward science,and interest in science of sixth grade students

This study was designed to determine the influence of resequencing general science content on sixth grade students' science achievement, attitudes toward science, and interest in science. Resequencing content was accomplished for experimental group students through revising the order of textbook chapters in a general science course, in order to clarify content structure and establish interrelationships among major concepts. The subjects were 203 sixth grade learners randomly assigned to the two treatment groups of resequenced content and nonresequenced content. The findings revealed that students for whom content structure was clarified through resequencing general science chapters exhibited significantly higher science achievement, significantly more positive attitudes toward science, and significantly greater interest in science than students for whom general science content was not resequenced.     

Learning Environment and Attitudes Associated with an Innovative Science Course Designed for Prospective Elementary Teachers

This study assessed the effectiveness of an innovative science course for improving prospective elementary teachers’ perceptions of laboratory learning environments and attitudes towards science. The sample consisted of 27 classes with 525 female students in a large urban university. Changing students’ ideas about science laboratory teaching and learning and creating more positive attitudes towards science were accomplished by using a guided open-ended approach to investigations, together with instructors who used cooperative learning groups to create a supportive environment. Ideas and attitudes prior to the course were assessed using a questionnaire focusing on the students’ previous science laboratory courses, and these were compared to data collected at the end of the course. Students reported large and statistically significant improvements on all seven scales assessing the laboratory learning environment and attitudes towards science. The largest gains were observed for Open-Endedness and Material Environment (with effect sizes of 6.74 and 3.82 standard deviations, respectively). An investigation of attitude-environment associations revealed numerous positive and statistically significant associations in both univariate and multivariate analyses. In particular, the level of Instructor Support was the strongest independent predictor of student attitudes at two levels of analysis.     

Gender,race, ethnicity,and science education in the middle grades

This article examines gender differences in science achievements and attitudes during the middle grade, when our nation's scientific pipeline begins to emerge. It uses data from a large, nationally representative sample of eighth-grade students (NELS-88). The findings show that in these grades female students do not lag behind their male classmates in science achievements tests, grades, and course enrollments. Actually, some female students have higher probabilities of enrolling in high-ability classes than males. However, female students have less positive attitudes toward science, participate in fewer relevant extracurricular activities, and aspire less often to science careers than males. Students' science attitudes and career interests vary according to students' gender as well as their racial or ethnic background. These findings emphasize the need to further examine the interrelationships between gender and race or ethnicity in our efforts to understand the processes leading to women's limited participation in science-related careers.     

Science education for rural Latino/a students: Course placement and success in science

This study investigated the effects of one rural high school's science course placement practices on Latino/a student success in science, as measured by performance in a required science course and enrollment in subsequent science courses. The high school involved in this study has experienced a rapid increase in language minority students and placed students considered to be “limited English proficient” into a science course intended for those with learning disabilities. The results indicate that track placement was inappropriate, as Latino/a students with demonstrated success on standardized tests written in English, and with high grade point averages, were placed in the lower‐level science course. Students placed in the lower‐level science course, regardless of academic ability, were unlikely to take subsequent courses required for college admission despite the fact that most had college aspirations. Conversely, low‐achieving non‐Latino/a White students were disproportionately placed in upper‐level science classes, a track associated with greater success in science for all. Thus, despite this rural school's attempt to provide for the needs of all the students, the result in this case was decreased success in science for Latino/a students, regardless of their English fluency. Implications for inclusive rural science education are discussed. © 2005 Wiley Periodicals, Inc. J Res Sci Teach 42: 376–402, 2005     

Soft and hard variables in determining pre‐service teachers' intentions and decisions to pursue a special education career

This study examined the roles of hard variables and soft variables in determining college teachers' intentions to pursue a special education career and education majors' actual decisions to major in special education. This study surveyed 243 college students taking special education courses at a state university, including 213 education majors. The survey questions included four blocks of variables, pertaining to demographics, training and work experience, soft variables (i.e., personal connections to people with disabilities, personal value and commitment and perceived social support) and hard variables (i.e., estimated salary, workload, professional development opportunities and job security). Results suggest that (1) after controlling for other variables, hard factors such as salary did not add significant contributions to college students' intention or education majors' actual action to pursue a special education career; (2) soft variables, such as value, commitment to special education and perceived social support, significantly predicted college students' intention to pursue a special education career, but did not significantly influence education majors' actual decision to choose a special education program, and (3) workloads significantly affect education majors' decisions making decisions of enrolling in a special education program. Implications are discussed about the importance of enhancing soft‐variable aspects of working conditions for special education recruitment and retention.     

The effects of instruction on college nonmajors' conceptions of respiration and photosynthesis

Students in a college nonscience majors' biology course took tests designed to reveal their conceptions of respiration and photosynthesis before and after course instruction. Even though most students had taken at least a full year of biology, serious misconceptions persisted. Most students gave definitions of respiration, photosynthesis, and food which were markedly different from those generally accepted by biologists. These incorrect definitions were associated with more fundamental misunderstandings about how plants and animals function. Most students could not explain how animal cells use either food or oxygen. They understood plants as vaguely analogous to animals, taking in food through their roots instead of mouths. Previous biology instruction seemed neither to improve student performance on the pretest nor to prepare them to master these conceptions during the course. Course instruction did improve student's understanding, but misconceptions persisted for many students. These results raise fundamental questions about the effectiveness of curriculum and instruction in current high school and college biology courses.     

Approaching Civic Responsibility Using Guided Controversies About Environmental Issues

Abstract. We implemented a series of three guided controversies to provide experience in environmental problem solving to students in a science course designed for nonmajors. Students wrote essays in response to their experiences in each controversy; we analyzed these essays for five problem-solving criteria. A questionnaire administered at the end of the course supported an increased interest in civic engagement as a result of the integration of the controversies within the course. These teaching strategies and learning outcomes appear to be instrumental in equipping students as citizens with the skills needed to engage in decision making regarding environmental problems.     

Measuring change in professionalism attitudes during the gross anatomy course

By design or default, anatomy educators are often responsible for introducing students to medical professionalism. Although much has been said about the role of anatomical education, there are no published reports suggesting how to measure change. This study investigated what professionalism attitudes, if any, change during a gross anatomy course. Additionally, the influence of four dichotomous variables related to student identity and preparation for medical school were analyzed for their effect on professionalism attitudes. A cross‐sectional time‐one (T1; beginning of the course), time‐two (T2; end of the course) study using the Penn State College of Medicine Survey of Professionalism was conducted. A multivariate analysis of variance identified the main effects and interaction effects of categorical variables. A Mann Whitney U test verified significant differences. This study found a reprioritization of professionalism attitudes in favor of altruism (P = 0.04 with a Cohen's d = 0.26) at T2. Female students (P = 0.03, Cohen's d = 0.38) and students from a science background (P = 0.04, Cohen's d = 0.36) changed the most in favor of altruism. Interestingly, though several factors correlated with dissimilarities in professionalism values at T1, gender was the only factor to show a significant difference in professionalism attitudes at T2. This cohort of students reported a statistically significant increase in altruism and no significant decreases in other professionalism attitudes concurrent with the gross anatomy course. Anat Sci Educ 3:12–16, 2010. © 2009 American Association of Anatomists     

Comparison of anxiety levels of students in introductory earth science and geology courses

Students in geology and earth science courses were not anxious about taking these courses as measured by the State-Triat Anxiety Inventory. Students in each course were split into two grade groups. It was shown that students whose grades were in the higher group had low anxiety, which continued to be reduced during the course. Students in the lower grade group had high anxiety, which increased during the course. There was no difference between anxiety scores of males and females. In general, students who planned to elect additional courses had lower state anxiety and higher grades than students who did not plan to elect additional courses in geology and earth science.     

Using reasoning ability as the basis for assigning laboratory partners in nonmajors biology

Students in a large one-semester nonmajors college biology course were classified into one of three groups (intuitive—I, transitional—T, reflective—R) based upon a pretest of scientific reasoning ability. Laboratory teams of two students each then were formed, such that all possible combinations of reasoning abilities were represented (i.e., I-I, I-T, I-R, T-T, T-R, R-R). Students worked with their assigned partners during each of the course's 14 laboratory sessions. Gains in reasoning ability, laboratory achievement, and course achievement, as well as changes in students' opinions of their motivation, enjoyment of the laboratory, and their own and their partner's reasoning abilities were assessed at the end of the semester. Significant pre- to posttest gains in reasoning ability by the intuitive and transitional students were found, but these gains were not significantly related to the laboratory partner's reasoning ability. Also, course achievement was not significantly related to the laboratory partner's reasoning ability. Students were perceptive of others' reasoning ability; the more able reasoners were generally viewed as being more motivated, having better ideas, and being better at doing science. Additional results also indicated that course enjoyment and motivation was significantly decreased for the transitional students when they were paired with intuitive students. Apparently, for students in transition (i.e., not at an equilibrium state with regard to reasoning level), it is frustrating to work with a less able reasoner. However, some evidence was found to suggest that reflective students may benefit from working with a less able partner.     

Preparing teachers as researchers in courses on methods of teaching science

The four standards for professional development of teachers of science from the National Science Education Standards (NRC, 1996) provided a frame for reflection upon ways in which prospective teachers engaged in research in my courses on methods of teaching science. Students learned both science content and science pedagogy by inquiry. An extended research project helped students to integrate knowledge of science, learning, pedagogy, and students, and to apply that to teaching science. Students built knowledge, skills, and attitudes for lifelong learning by participating in a research festival and presenting at conferences. I designed this science-teaching methods course in the context of a teacher education program that is attempting to implement reform approaches to instruction. © 1998 John Wiley & Sons, Inc. J Res Sci Teach 35: 791–809, 1998.