Educating the urban poor

The historical evidence is examined to see how low-income students have fared in the urban public schools. Research shows that some schools have been able to raise low-income student achievement. In Rutter's 7-year study, leadership of the principal, high teacher expectations, and rigorous academic programs helped raise achievement. While some results have shown that a majority of low-income students have failed, some immigrant groups, such as Jews, seem to adapt more readily and perform better. The implication is that there may be hope for a substantial improvement in the urban public schools.     

Overcoming institutional barriers to broad-based curricular change

Most large organizations, including universities, are fraught with institutional barriers to change. Their very structures can be impediments to the horizontal communication and cooperation necessary to effect broad-based innovation. U.S. automobile makers, however, are learning to overcome such structural obstacles to facilitate innovation. Can universities employ similar techniques? The recent experience of one regional university suggests important attributes of a successful model to facilitate curricular change.     

Testing a reciprocal causation model between anxiety,enjoyment and academic performance in postsecondary organic chemistry

Affective factors such as the achievement emotions are considered critical for students’ academic performance in STEM degree programmes and careers. In this study, a reciprocal causation model was tested between two affective factors: enjoyment and anxiety, and organic chemistry course performance. Each variable was measured three times in four sections of a first semester organic chemistry course. This study investigates a reciprocal causation relationship between anxiety, enjoyment and achievement as measured by exam performance compared to unidirectional structures of performance and affect relationships. Results show that the reciprocal causation model with an exam snowballing effect best fits data among the alternative models. There is a small and significant negative relationship between anxiety and performance contrasted with a positive relationship between enjoyment and performance throughout the semester. The evidence of the reciprocal relationship between anxiety, enjoyment and achievement indicates that instructors of organic chemistry can work to eliminate factors associated with low performance. Gathering information regarding anxiety and enjoyment along with performance can inform educators about the emotional state of their classrooms. Future research should consider achievement emotions in light of educational reforms to ensure that innovative curricula or pedagogies are functioning in the classroom as intended.     

On Simulation and the Teaching of Statistics

The use of simulation as an instructional tool can promote a deep conceptual understanding of statistics and lead to misunderstandings. Teachers need to be aware of the misconceptions that can arise as a result of simulation and carefully structure classroom activities so as to derive the benefits of this powerful instructional tool.     

The impact of parenting on risk cognitions and risk behavior: a study of mediation and moderation in a panel of African American adolescents

Hypotheses concerning the extent to which adolescents' cognitions mediate the relation between parenting behaviors and adolescent substance use were examined in a panel of African American adolescents (N = 714, M age at Time 1 = 10.51 years) and their primary caregivers. A nested-model approach indicated that effective parenting (i.e., monitoring of the child's activities, communication about substances, and parental warmth) was related to adolescent substance use more than 5 years later. The parenting behaviors protected the adolescent from subsequent alcohol, tobacco, and marijuana use through associations with two cognitive elements from the prototype/willingness model: favorable risk images (prototypes) and behavioral willingness. Additional analyses indicated that these protective effects were strongest among families residing in high-risk neighborhoods.     

Investigating optimal technique in the presence of motor system noise: application to the double layout somersault dismount on high bar

Minimising joint torque is often used as an optimisation criterion when investigating human movement. Alternatively, an aspect of performance may be chosen to be maximised when investigating sporting movements. The aim of the study was to optimise the technique in the backward giant circle prior to a double layout somersault dismount from the high bar using various criteria to determine which best characterised the technique adopted by a gymnast. Ten recorded gymnast trials were used to determine bar release parameters and the level of noise in the gymnast’s movements. A computer simulation model of a gymnast and bar was used to optimise giant circle technique under three criteria: minimising joint torques, maximising the release window and maximising success in the presence of motor system noise. Local and global optimisations of technique were performed using the three criteria starting from the average technique of the 10 recorded trials. All global optimum solutions diverged from the gymnast’s technique. The local optimum for maximising success in the presence of noise had a success rate comparable with the global optimum (98% vs. 100%, respectively). It is concluded that the gymnast’s technique is characterised by maximising success despite operating with motor system noise.