Student conceptions of natural selection and its role in evolution

Pretests and posttests on the topic of evolution by natural selection were administered to students in a college nonmajors' biology course. Analysis of test responses revealed that most students understood evolution as a process in which species respond to environmental conditions by changing gradually over time. Student thinking differed from accepted biological theory in that (a) changes in traits were attributed to a need-driven adaptive process rather than random genetic mutation and sexual recombination, (b) no role was assigned to variation on traits within a population or differences in reproductive success, and (c) traits were seen as gradually changing in all members of a population. Although students had taken an average of 1.9 years of previous biology courses, performance on the pretest was uniformly low. There was no relationship between the amount of previous biology taken and either pretest or posttest performance. Belief in the truthfulness of evolutionary theory was also unrelated to either pretest or posttest performance. Course instruction using specially designed materials was moderately successful in improving students' understanding of the evolutionary process.     

Playing with Moon Sand: a narrative inquiry into a teacher’s experiences teaching alongside a student with a chronic illness

This paper inquires into the experiences of an early childhood educator named Claire who taught a young girl with a chronic illness at East Willows Elementary School, a western Canadian elementary school. Using narrative inquiry as the methodology, Claire’s experiences in her curriculum making alongside Madeline a young girl with Turner syndrome were explored and analyzed. In navigating through this curriculum around chronic illness, Claire negotiated liminal spaces between health and unhealth, sickness and wellness, capability and desire using stories of playful curriculum making. Through these liminal spaces, Claire created forward-looking stories of a new curriculum; a curriculum defined by playfulness, counterstories of play, the lived and planned curriculum, and the sharing of authority. This playful curriculum, this curriculum of play, became the negotiated story to live by for Claire and Madeline at East Willows Elementary School.     

A comparison of blood pressure in term, low birth-weight infants of smoking and nonsmoking mothers

Infants exposed to the components of cigarette smoke in utero are at an increased risk for perinatal death, low birth weight, sudden infant death syndrome, and premature delivery. The purpose of this pilot study was to compare blood pressure values in term low-birth weight infants (相似文献   

Instructor Social Presence Effects on Learner Social Presence,Achievement, and Satisfaction

Instructor social presence involves instructors establishing their presence as “being there” in terms of frequency of communication and interaction with students as well as supporting students throughout the learning process (Lowenthal 2015). Instructor social presence can be constructed and maintained through the design and facilitation of online courses. Studies have indicated that instructor social presence can be correlated with increased learning satisfaction, engagement and achievement as well as learners perceptions of the instructor. This sequential explanatory mixed method study investigated the effects of instructor social presence on achievement, satisfaction and learner social presence and further sought to identify effective instructor social presence techniques in asynchronous online courses. The results of this study showed that the degree of instructor social presence significantly influenced instructor perceptions of student achievement. Findings also suggest that a well-designed collaborative learning activity can be an effective strategy for building instructor social presence.     

Mapping Access and Opportunity for Students with Disabilities: Urban K–8 Schools as Pockets of Privilege

Abstract

Using a DisCrit intersectional lens and statistical and spatial methods, we trace how the creation of K-8 schools functioned to create pockets of privilege in one urban U.S. school district. K-8 schools were both whiter and wealthier than district averages, serving as “enclave” schools. Although far fewer students with disabilities were served in K-8 schools compared to traditional elementary and middle schools, those attending K-8 schools were more likely to be educated in inclusive settings.     

The Family Context of Gender Intensification in Early Adolescence

This longitudinal study of 144 young adolescents (ages 9–11 at phase 1) examined the hypothesis that boys and girls would experience increased "gender-differential socialization" across a 1-year period in early adolescence, and that such patterns would be stronger in families in which ( a ) parents maintained a traditional division of labor, and ( b ) there was a younger sibling of the opposite gender. Longitudinal analyses of 3 aspects of family socialization (adolescents' participation in "feminine" and "masculine" household chores; adolescents' involvement in dyadic activities with mothers and fathers; parental monitoring) revealed that gender intensification was apparent for some aspects of family socialization but not others. In addition, when gender intensification was apparent, it generally emerged in some family contexts but not in others. Only dyadic parent-adolescent involvement was characterized by an overall pattern of gender intensification in which girls became increasingly involved with their mothers and boys with their fathers; this pattern was exacerbated in contexts where adolescents had a younger, opposite-sex sibling.     

A Comparison of Preservice Teachers' Mathematics Anxiety Before and After a Methods Class Emphasizing Manipulatives

The changes in levels of mathematics anxiety among future teachers in two different mathematics materials and methods classes were investigated. The changes were a function of using: (a) Bruner's framework of developing conceptual knowledge before procedural knowledge, and (b) manipulatives to make mathematics concepts more concrete. The sample included 87 preservice teachers enrolled in mathematics methods courses. Two strategies were used to gather data both at the beginning and ending of each quarter. First, future teachers completed 98-item, Likert-type questionnaires. Second, some of the factors that influence the levels of mathematics anxiety were determined through the use of questionnaire-guided narrative interviews. Multivariate analysis of variance was employed as the quantitative measure for comparing mathematics anxiety both at the beginning and ending of the quarter. Data revealed a statistically significant reduction of mathematics anxiety levels (p < .05). Tukey's HSD was used to determine that a significant difference in mathematics anxiety levels occurred between the classes in the fall and winter quarters. Results of the study have implications for teacher education programs concerning the measurement of mathematics anxiety levels among future teachers and the determination of specific contexts in which that anxiety can be interpreted and reduced.     

Ethics courses: Their impact on the values and ethical decisions of criminal justice students

Numerous articles and books advocate the importance of ethics as an essential component of a criminal justice curriculum. While there are several approaches suggested, one of the most popular methods of assuring coverage of this important topic is to add an ethics course to the curriculum either as a required or an elective course. Teaching students ethical theories, principles and providing them with the opportunity to discuss discipline specific ethics problems is thought to help contribute to the establishment of ethical practitioners.

The purpose of this research is to examine the impact of a semester long criminal justice ethics course on the students' value orientations, and their perceptions of both the seriousness of ethical violations and their likelihood of engaging in such behaviors. Our findings are consistent with the results of researchers evaluating ethics courses in other disciplines. Implications for criminal justice ethics education are discussed.