A content analysis of the presentation of the mole concept in chemistry textbooks

The goal of this study was to examine the means used by textbook authors to introduce, define, and explain the mole concept in high school and introductory college chemistry textbooks. The analysis was framed by four questions:

• 1 How is the mole defined?
• 2 What concepts about the atom are introduced prior to the mole?
• 3 Is Avogadro's constant presented as an experimentally determined value?
• 4 What is the context for introducing the mole?

Twenty-nine high school and introductory college level chemistry texts were examined. After independent reading of appropriate sections of each text, discussion of differences, second or third readings of texts, and subsequent discussions, both authors reach 100% agreement concerning the results. Major conclusions were

• 1 Two ways of defining the mole dominate the texts. One way defines the mole as Avogadro's number (6.02 × 10²³) particles; the other method defines the mole in terms of carbon-12.
• 2 All texts that present a definition in terms of C-12 introduce and define concepts about the atom prior to introducing the mole.
• 3 Most texts at all levels point out that the value 6.02 × 10²³ is an experimentally determined quantity.
• 4 Nearly all texts discuss the mole in relation to die problem of finding a way to count particles that are too small to be directly weighed. Most texts also use a familiar counting unit, such as the dozen, to introduce the mole by analogy.

Four issues were discussed: (a) the defining attributes of the mole concept itself and the cognitive requirements for comprehending the two most frequently used definitions; (b) the connection between the definition of the mole presented in the text and the concepts about atoms that are introduced before the mole concept is developed; (c) the experimental nature of Avogadro's number; and (d) the context or setting for developing the mole concept.     

UK higher education viewed through the marketization and marketing lenses

This paper uses the Economic Market mechanisms and the 4P Marketing Mix as lenses to review the context of UK higher education (HE) and to explore the relationship between the market and marketing disciplines and practice. Four Economic Market mechanisms – autonomy, competition, price and information – are contrasted with the four Ps of marketing: product, price, place and promotion. This paper demonstrates how market forces influence HE institutions and, in contrast, how HE institutions shape the environment via marketing practice. Knowing how one discipline relates to another is crucial for those who strive to understand the context of HE.     

The Place of Philosophy in the Training of Teachers: Peters revisited

Abstract

In 1964, Richard Peters examined the place of philosophy in the training of teachers. He considered three things: Why should philosophy of education be included in the training of teachers; What portion of philosophy of education should be included; How should philosophy be taught to those training to be teachers. This article explores the context of the time when Peters set out his views, describes philosophy of education at the London Institute of Education at one period in Peters’ time there, and then discusses the current state of philosophy of education, using New Zealand as an example of opportunities and challenges. Finally, asking whether Peters was nearly right about the place of philosophy in the training of teachers, it is concluded that he was right about its importance but got it wrong about his conception of philosophy.     

The privatisation of public schooling in New Zealand

This paper examines recent privatisation practices in New Zealand public schooling. The standard political rhetoric is that free publicly provided schooling is guaranteed by statute. This position may be challenged by reference to two apparently insignificant practical examples of the way in which policy gives effect to privatisation in public schooling: (1) the commissioning of national assessment strategy policy advice, and (2) the award of contestable funding for the provision of support services to schools. It is argued that such practices advance neoliberal theories of schooling at the expense of the previous social democratic liberal settlement. The paper considers some possible consequences of increased privatisation of policy advice and service provision for understandings of and commitments to public schooling.     

Entry to the Skilled Trades in Australia: the role of family background and school achievement

This paper reports an analysis of factors associated with entry to skilled trades through the Australian apprenticeship system. It is based on data collected from a sample of nearly 2500 17‐year‐old males in 1978. The results suggest that:

(a) young males whose fathers were tradesmen were more likely to participate in apprenticeship training than other young males;

(b) apprentices had relatively higher achievement on numerical tests than on verbal tests;

(c) the sons of migrants from non‐English speaking countries were less involved in apprenticeship than other 17‐year‐old males; and

(d) young males who had attended private secondary schools were less likely to be involved in apprenticeship training than those who had attended public schools.

It was found that whether a person's father was a tradesman was a better predictor of participation in apprenticeship than the social prestige of the father's occupation.     

COGNITIVE DEVELOPMENT AND CAREER RETRAINING IN OLDER ADULTS

Recent research on the cognitive development and functioning of older adults is reviewed and explored in relation to vocational retraining. It is argued that an ecological approach to the study of cognitive development in older adults is preferable, based on the life‐phase, hierarchical‐stage and cognitive functioning literatures. The relevance of this literature for career development in older adults is considered and suggestions for future research are offered. In particular, it is proposed that retraining programs designed to facilitate the career adaptability and success of older persons should attempt to increase their cognitive complexity and flexibility.     

Profiles in Change: An Alternative Look at the Marshall Hypotheses∗

U.S. Supreme Court Justice Thurgood Marshall once argued that informed opinion would oppose the death penalty for all but those who support it for retributive reasons. We examine the validity of these claims with data from a series of one‐group pre‐test–post‐test designs which stem from a formalized learning outcomes assessment for several courses on the death penalty. Results show solid, but imperfect, support for these claims. The analysis then proceeds by profiling those who changed their opinions consistent with these claims, those who did not change their opinions, and those whose opinions changed in a manner opposite to these claims.     

FACULTY DEVELOPMENT IN TEXAS TWO-YEAR COLLEGES

To discover the organizational components that nurture good teaching in Texas two-year colleges, I undertook the task of replicating a study of Ohio two-year colleges. A review of the literature uncovered several variables for assessing faculty development. The most important of these appears to be an institutional climate that encourages faculty development. To assess faculty development, a 65-item survey was sent to all Texas two-year colleges. Although the results of the Texas study are more encouraging than those of the Ohio study, Texas community colleges could be doing more to support faculty development.     

Comparisons of Four Methods for Estimating a Dynamic Factor Model

Four methods for estimating a dynamic factor model, the direct autoregressive factor score (DAFS) model, are evaluated and compared. The first method estimates the DAFS model using a Kalman filter algorithm based on its state space model representation. The second one employs the maximum likelihood estimation method based on the construction of a block-Toeplitz covariance matrix in the structural equation modeling framework. The third method is built in the Bayesian framework and implemented using Gibbs sampling. The fourth is the least squares method, which also employs the block-Toeplitz matrix. All 4 methods are implemented in currently available software. The simulation study shows that all 4 methods reach appropriate parameter estimates with comparable precision. Differences among the 4 estimation methods and related software are discussed.