Alfred Wegener—From continental drift to plate tectonics

What is the nature of the force or mechanism that moves massive continents thousands of miles across? What causes violent earthquakes to displace huge landmasses abruptly? How could great mountain ranges like Himalayas and Alps rise to such incredible heights? What makes earth's interior so restless? Answers to some of these questions may lie in understanding the Earth's interior itself.     

Gardnerella vaginalis infection and sexual contact in female children

Gardnerella vaginalis (GV) infection has been reported as being acquired via sexual contact in adults and as an indicator of sexual contact in female children (DeJong, 1985). The purpose of this study was to determine if GV infection was more commonly found in 191 female children who gave a history of sexual contact and/or were infected with Neisseria gonorrhoeae (GC) or Chlamydia trachomatis (CT) (Group 1), compared with 144 female children evaluated for possible sexual abuse and found to have no such history or infection with GC or CT (Group 2), or 31 female children (friends of the authors) without such a history or GC or CT infection (Group 3). Vaginal GV was found in 5.3% of Group 1, 4.9% of Group 2 and 6.4% of Group 3 (p > .05). Also, vaginal GV infection was not related to the type of sexual contact or race, but did increase with age in white female children. Because vaginal GV infection is not more commonly found in children with a history of sexual contact than those without such a history, the finding of GV in a vaginal culture in an individual case would not be a reliable marker of sexual contact. Routine culturing for GV is not recommended as part of a sexual abuse workup.     

Computer Literacy as Ideology

Some of the most prominent policies in schools throughout the industrialized world today relate to the rapid introduction of computers. The most common rationale for introducing educational microcomputing is the concept of ‘computer literacy’. It is a concept, however, which is so poorly defined and delineated, and so unclear as to purpose and procedure, that it may best be investigated as a form of ideology. The justificatory arguments for computers in classrooms are primarily vocational or practical. They are based on assumptions that computers will be pervasive in the workplace of the future, or that they are soon going to be ‘everywhere’. The more purely pedagogical arguments are secondary: that learning about computers is a worthwhile experience in and of itself, and that computers can be useful productivity tools for other academic work. Drawing upon empirical evidence from an evaluation of computer use in two Canadian high schools, this paper shows how a critical treatment of computer literacy as ideology raises important issues about the computerization of education. It suggests that educators should question whether they have simply taken the ideology of computer literacy at face value, and whether this almost universal policy has received the critical attention it deserves.     

Relative effectiveness of reading practice or word-level instruction in supplemental tutoring: how text matters

In this quasi-experimental study, which is part of a series of investigations on supplemental reading tutoring variations, the relative effectiveness of more intense decoding instruction or text reading practice was examined. Fifty-seven first-grade students scoring in the lowest quartile for reading skills received either classroom reading instruction or one of two treatments: tutoring in word study with text reading practice, or word study tutoring alone. Individual instruction was provided by trained paraprofessional tutors. At the end of first grade, treatment students significantly outperformed their nontutored peers on measures of reading accuracy, reading comprehension, reading efficiency, passage reading fluency, and spelling. Differential treatment effects on passage reading fluency are examined, taking into consideration pretest skill levels and text reading practice characteristics.     

Metaphoric competence in children with learning disabilities

Metaphoric competence was examined in two groups of children with learning disabilities and one group of nondisabled peers ranging in age from 9-0 to 11-0 years. There were five girls and seven boys in each group. One group of students with learning disabilities had a history of spoken language impairment and the other group did not. Subjects were administered three verbal metaphor tasks (comprehension, preference, and completion) and a visual metaphor task, the Metaphor Triads Task (MTT). The three verbal metaphor tasks were administered in three contexts: (a) sentence, (b) story, and (c) story plus visual (pictorial) support. The group with a history of language impairment consistently performed more poorly on the metaphor tasks than the group without a history of language impairment, who, in turn, performed more poorly than the nondisabled children on all but the MTT. Context variations had no effect on children's performance. Theoretical and clinical implications will be discussed.     

Application of CAE in Teaching Vibration Engineering

CAE has enabled vibrational problems, which were regarded as intractable 20 years ago, to be solvable by students using computational support. The paper describes a problem set to final year undergraduates which concerns the torsional vibrational response of a three degrees of freedom system which is subjected simultaneously to three different arbitrarily varying torques. The solution involves the use of standard library routines for matrix multiplication and eigensolutions, a Runge-Kutta routine to solve a second order differential equation and general competence in writing software.     

Curriculum Contests: environmental studies versus geography

Much of the literature promoting environmental education as ‘a just cause’ assumes a rational discussion of curriculum options. In fact, the promotion of new curriculum areas threatens existing subject territories. Historically environmental education has threatened the boundaries of geography. Thus, by studying these ‘border wars’ we learn more about the process of promoting new curriculum areas. This paper seeks to build on previous work which has scrutinised the social history of school subjects. A conviction underlying this work has been that as well as studying the interactive nature of curriculum practice, also examining the conflict over the definitions of curriculum which precede classroom events (with the insights thereby provided into the vested interests involved) will further our understanding of ‘what counts as education’.     

Observations from the classroom: When analogies go wrongi

Specializations: teachers' pedagogical knowledge, analogical reasoning, conceptual change.