Assistant Teachers in Head Start Classrooms: Comparing to and Working With Lead Teachers

Research Findings: The purpose of the present study is to examine the degree to which assistant and lead teachers work together in Head Start classrooms in 3 domains: emotional support, classroom organization, and instructional support. Pairs of lead and assistant teachers from 14 Head Start classrooms were simultaneously observed for 1 morning to examine the quality of teachers’ interactions with students in these 3 domains. First we examined the mean levels of the 3 domains and how they differed among teachers. Overall, results indicated moderate levels of emotional support and classroom organization and low levels of instructional support. In comparing lead and assistant teachers, we found that lead teachers offered significantly higher levels of instructional support than assistant teachers. Next we examined how the quality of lead and assistant teachers’ interactions were related over time. Concurrent correlations were nonsignificant. Lagged correlations suggested that lead and assistant teachers’ interactions with students were related over time. Practice or Policy: Assistant teachers offered comparable levels of emotional support and classroom organization but did not offer the same levels of instructional support. This suggests that assistant teachers are able to help provide a nurturing environment and help with structuring activities despite having lower entry-level qualification requirements. This study supports the notion that assistant teachers as well as lead teachers should be included in quality improvement efforts.     

Using Action Research to Innov8: Facilitating Culture Shifts in the Scholarship of Teaching and Learning

ABSTRACT

The mission of a community college is distinct from a research one university, where empirical research is valued over investigation of discipline-based teaching and learning. The open-access, affordable, workforce, and transfer emphasis that serves many non-traditional community college students is a rich, meaningful environment for fostering the scholarship of teaching and learning, yet despite an emphasis on best practices and student success outcomes, teaching, and learning in this environment is an underappreciated element of the faculty role. This study explores the use of action research to facilitate engagement in the scholarship of teaching and instructional innovation. The mixed-method action research design incorporated quantitative and qualitative analysis from a wide variety of data sources and triangulated findings through a variation of techniques, including ongoing researcher dialogue and ratings. Action research serves as both the method for this study and the mechanism for faculty research on classroom innovations. This was substantiated as a catalyst for cultivating ongoing inquiry and professional growth. The Innov8 program and integration of action research appears to have a long-term, substantive impact on faculty perspectives, specifically influencing faculty culture, continued educational investigation, and ultimately student learning outcomes.     

An Author as a Counter-Storyteller: Applying Critical Race Theory to a Coretta Scott King Award Book

This article analyzes the 2002 Coretta Scott King Award book by Mildred Taylor entitled The Land. The novel and its author are situated within a tradition of historical fiction written by and about African Americans. I then offer an analysis that utilizes Critical Race Theory as an interpretive tool for examining the ways Taylor embeds meanings of land ownership into the novel. In particular the following themes emerged: (1) inspiration and adoration, (2) entitlement and privilege, and (3) freedom and security. The conclusion addresses the importance of applying Critical Race Theory to literary studies as well as identifying ways to purposefully incorporate African American young adult historical fiction within today’s classrooms. In this article, the ownership of land as property is foregrounded although the term “property” is both literally and metaphorically understood in Critical Race scholarship (Harris 1993).     

Statistically Comparing the Performance of Multiple Automated Raters Across Multiple Items

Automated scoring systems are typically evaluated by comparing the performance of a single automated rater item-by-item to human raters. This presents a challenge when the performance of multiple raters needs to be compared across multiple items. Rankings could depend on specifics of the ranking procedure; observed differences could be due to random sampling of items and/or responses in the validation sets. Any statistical hypothesis test of the differences in rankings needs to be appropriate for use with rater statistics and adjust for multiple comparisons. This study considered different statistical methods to evaluate differences in performance across multiple raters and items. These methods are illustrated leveraging data from the 2012 Automated Scoring Assessment Prize competitions. Using average rankings to test for significant differences in performance between automated and human raters, findings show that most automated raters did not perform statistically significantly different from human-to-human inter-rater agreement for essays but they did perform differently on short-answer items. Differences in average rankings between most automated raters were not statistically significant, even when their observed performance differed substantially.     

Do footfall patterns in forefoot runners change over an exhaustive run?

The purpose of this study was to investigate possible footfall pattern changes in habitual forefoot runners over a prolonged, exhaustive run. A prolonged run was performed to exhaustion in 14 habitual forefoot runners. Vertical ground reaction forces (VGRFs) and kinematics were collected at the beginning and end of the run. Ankle plantar flexor torque and triceps surae electromyographic activity were measured during pre- and post-run isometric contractions. By run’s end, there was an increase in VGRF loading rate and impact peak magnitude, greater dorsiflexion at foot contact and greater knee flexion angle throughout stance. Ankle plantar flexor torque decreased significantly from pre- to post-run tests. This was accompanied by a decrease in the integrated electromyographic activity (iEMG) output for the lateral and medial gastrocnemius. There were significant changes in landing mechanics for forefoot runners that indicate a transition towards more midfoot footfall patterns. A contributing factor may be ankle plantar flexor muscle fatigue that, at touchdown, is exposed to exaggerated eccentric loading. These findings suggest that a forefoot running pattern may become difficult to maintain in longer endurance events, and thus runners should pay attention to this in training to improve performance and mitigate potential injury.     

多种媒体教学中的几个问题

通过对教学媒体的种类及功能特性的介绍,说明在多媒体教学中选择、使用媒体时应注意的问题.