Quantifying physical activity in first-through fourth-grade physical education via pedometry

The aim of this study was to determine pedometry steps per minute (SPM) cutscores that accurately quantify physical activity (PA) time in first- through fourth-grade physical education. A total of 257 participants were grouped in two data pools, first- and second-grade (n = 126), and third- and fourth-grade (n = 131). Systematic observation was the PA criterion instrument and pedometry was the predictor instrument. Correlations between physical activity measures were strong (r = .82-.89, p < .01). Ten min of PA and 33.33% of the lesson time engaged in PA within a 30-min class can be quantified by 61-63 SPM for first- and second-grade, and 58-61 SPM for third- and fourth-grade. IN CONCOLUSION: (a) SPM values were a valid indicator of students achieving or not achieving PA criteria, and (b) pedometry is a valid and practical tool for physical activity surveillance within physical education.     

Grand missions of agricultural innovation

This paper discusses three related examples of mission-oriented agricultural institutional innovations associated with substantial crop yield increases in the 20th century. It begins with the implementation of the United States Land-Grant System and then discusses in turn the planning and implementation of the two grand missions that led successively to the yield increases in wheat and rice that heralded the onset of the “Green Revolution.” It notes the remarkable role of the Rockefeller Foundation in identifying these two missions, and selecting personnel developed within the land-grant system to execute them with remarkable effectiveness.     

Stability, change, and correlates of the peer relationships of young children with mild developmental delays

The peer relationships of young children with mild developmental (cognitive) delays recruited at 4-6 years of age were examined in a longitudinal study across a 2-year period. Results revealed only modest increases in children's peer interactions, a high degree of intraindividual stability, and the existence of a poorly organized and conflict-prone pattern of peer interactions. Child cognitive and language levels as well as family stress and support were associated with children's peer interactions. A subgroup was identified of initially low interactors who were at especially high risk for future peer interaction problems. These findings further underscore the importance of designing and implementing early intervention programs in the area of peer relationships for children with mild developmental delays.     

A simple and effective protein folding activity suitable for large lectures

This article describes a simple and inexpensive hands-on simulation of protein folding suitable for use in large lecture classes. This activity uses a minimum of parts, tools, and skill to simulate some of the fundamental principles of protein folding. The major concepts targeted are that proteins begin as linear polypeptides and fold to three-dimensional structures, noncovalent interactions drive this folding process, and the final folded shape of a protein depends on its amino acid sequence. At the start of the activity, students are given pieces of insulated wire from which they each construct and fold their own polypeptide. This activity was evaluated in three ways. A random sample of student-generated polypeptides collected after the activity shows that most students were able to create an appropriate structure. After this activity, students (n = 154) completed an open-ended survey. Their responses showed that more than three-quarters of the students learned one or more of the core concepts being demonstrated. Finally, a follow-up survey was conducted seven weeks after the activity; responses to this survey (n = 63) showed that a similar fraction of students still retained these key concepts. This activity should be useful in large introductory-level college biology or biochemistry lectures.     

The mentoring dilemma: guidance and/or direction?

Abstract

How effective is your mentoring programme? How does the nature of a mentoring programme influence outcomes? By looking beneath the process and practice, an examination, analysis and classification of the nature of current real‐life mentoring practice is made and a template for the identification of your own project is presented.     

EDITORIAL

Novice nurses encounter numerous factors that impact on their learning in the complex healthcare workplace. Registered nurses often work one‐on‐one with novices as preceptors to facilitate the development of novices’ clinical skills and socialisation into the profession. This paper explores the concept of preceptorship from novice nurses’ and preceptors’ perspective, drawing upon data from a project between a large healthcare organisation and a university in Melbourne, Australia. The study, framed in ethnomethodology, included fieldwork observation, interviews and student surveys; this paper focuses on data collected over a series of individual interviews with nursing students (n = 28) and preceptors (n = 25). Thematic analysis yielded six key themes: workplace socialisation, empathy, individuality, willingness to engage, changing support and a realisation [by novices about the preceptor role]. Findings highlight the complexity of workplace learning that is influenced by the idiosyncrasies of the individuals involved and the social milieu in which the learning takes place.