Factors associated with middle school students' perceptions of the quality of school-based sexual health education

This paper examines factors associated with middle school students' perceptions of the quality of the sexual health education (SHE) they received at school. Participants were 478 predominately White young people (256 girls, 222 boys) in grades 6–8 who completed a survey assessing their demographic characteristics; dating and sexual experience; and perceptions of the content, delivery and quality of the SHE they had received. Boys and students in a lower grade and with less sexual experience rated the quality of their SHE more positively. After accounting for student characteristics, students who more strongly agreed that their SHE matched their interests and covered sexual health topics more adequately, as well as who viewed their teacher as being more comfortable talking about sexual topics and doing a better job answering questions, reported higher quality SHE. Students' perceptions of the adequacy of coverage of 10 sexual health topics were also positively correlated with their reports of higher quality SHE, although only two topics (correct names for genitals and puberty/physical development) contributed uniquely to the prediction of this variable. These results reinforce the need for a comprehensive SHE curriculum as well as adequate preparation of teachers if SHE is to be engaging to students.     

复杂系统、知识管理与组织学习过程动态模型研究

知识经济时代的组织是一个具有无尺度网络结构的复杂系统。知识管理是知识经济时代的必然要求。组织学习作为组织获取核心竞争力和可持续发展能力的重要手段，是一个动态的过程。本文在系统回顾相关研究成果的基础上，从复杂系统的视角对知识经济时代复杂环境下的组织学习动态复杂过程进行了系统的模型整合和创新，并对构建学习型组织可能遇到的障碍进行了一系列对策分析。     

The probability distribution for a biased spinner

This article advocates biased spinners as an engaging context for statistics students. Calculating the probability of a biased spinner landing on a particular side makes valuable connections between probability and other areas of mathematics.     

Robots, jetpacks and time machines: children's ideas of English in the future

This article describes children's views of what English will be like in ten years time. Children from year 2 (6–7 year olds) and year 6 (10–11 year olds) took part in a study which involved discussion, writing activities and interviews. It was found that, on the whole, these children saw English in the future as being a balance between traditional methods of teaching and learning and technological innovations and advancements. For these children, technology will become an essential part of their education and their lives outside school.     

Play centers that encourage literacy development

Teachers are always searching for fresh ideas that address children's growth needs. Ideas that provide learning opportunities which are developmentally appropriate are particularly welcomed. using play as a medium for facilitating literacy growth is one such opportunity. We know from current theory, research and practice that sociodramatic play contributes to children's learning. Its importance in the development of literacy skills has also been investigated and affirmed. See Christie, 1991; Dodge & Frost, 1986; Fisher, 1991; Isenberg & Jacob, 1985; Morrow, 1989, 1990; Morrow & Rand, 1991; Pellegrini, 1980; Rogers & Sawyers, 1988; Schickendanz, 1986; Woodard, 1984.     

Portfolio analysis in the planning of higher education

It has recently been suggested that “portfolio analysis” has a role to play in the strategic planning of institutions of higher education. This article examines this proposition and finds it to be broadly correct. The article discusses the adaptation of the technique to the current context and then describes its application to data from a university.     

Reference books and computerized information services: partners in librarianship

As a basis for thoughts on the roles of reference books and computerized information services in general, a comparison is made of the value to medical libraries of a comprehensive reference tool (the new dual media publication Biomedical Research in Progress) and a comprehensive information center file (the Smithsonian Science Information Exchange, the national resource for information on research in progress). It is concluded that a detailed reference tool which is physically present for library users has several advantages, in particular the provision of both detailed and comprehensive retrieval of all biomedical research information at substantially less annual cost and with faster access time than is possible with comparable questions put to an information center. On the other hand, the information center is able to provide more up-to-date material in more flexible combinations. The recommendation is made that medical libraries avoid treating the comprehensive reference tool and the computerized information file as alternatives and instead view both as necessary and complementary to each other.