How Does Leadership Matter? Developing and Teaching a Definition of Hands-On Science, a Prerequisite for Effective Inquiry Teaching

This descriptive case study describes leadership skills and planning for setting clear directions by program leaders for a statewide professional development initiative to extend improvement in science teaching and learning. For science teachers and leaders in Virginia, a critical part of setting clear goals that everyone can understand is defining key science terms. One of the four key terms, hands-on science, is defined here. Materials to develop teachers\u27 understanding of the term for effective implementation of classroom inquiry activities are shared, along with a rubric for evaluation by and for teachers. Understanding of the term hands-on science is necessary before inquiry-based science teaching can be fully implemented. Authentic science materials, when safe, are necessary for doing authentic, inquiry-based science teaching in a way similar to how a scientist investigates science

Teaching and Learning Seminar for Science and Mathematics Faculty

A yearlong seminar for science and mathematics faculty to investigate teaching and learning is in its second year at George Mason University in Fairfax, Virginia. This article describes the seminar and preliminary findings from the first year

The Teacher Shortage: National Trends for Science and Mathematics Teachers

The shortage of science and mathematics teachers is a growing problem in the United States. This article looks at what research says about the causes for the growing teacher shortage and its effects on student achievement. As the teacher shortage worsens, teachers without a science or mathematics backgrounds are tasked to teach science and mathematics or underqualified teachers are being hired to fill the shortage. These underqualified teachers are not remaining in the profession, thus not solving the teacher shortage problem and creating an even higher turnover rate for teachers. In addition, experienced teachers are leaving the profession in greater numbers due to low salaries and job dissatisfaction. Research indicates that the initial preparation and support of teachers as they enter the profession is critical to surviving the beginning years and remaining in the profession. Additionally, well-prepared teachers have the largest impact on effective classroom practice and high student achievement

Third International Mathematics and Science Study (TIMSS) and the Nature of College Courses

The TIMSS report leads to some strong conclusions concerning the effectiveness of various approaches for teaching mathematics and science in grades K-8. This presentation will focus on a description of the findings of TlMSS concerning effective teaching. Although the TIMSS study and its findings relate directly to teaching prior to college, the findings do have a lot to say about effective teaching at the college level. At the very least, they describe the type of teaching and learning that future teachers must experience if they are to bring about this type of learning in their own courses

Production, reproduction, and reversion of protoplast-like structures in the osmotic strain of Neurospora crassa

Protoplasts devoid of cell walls have been produced in Bacillus megaterium and certain other Gram-positive species of bacteria.(1) Structures resembling protoplasts but not completely devoid of cell walls have also been produced in Escherichia coli and some other Gram-negative bacteria.(2) Those from Gram-positive and Gram-negative bacteria are alike in that they are spherical in shape and are lysed by osmotic shock. Bacterial protoplasts have already proved to have many useful applications among others, in the extraction of cellular constituents, in studies of the biosynthesis of enzymes and other macromolecular substances, and in host-parasite interrelations.(3

Maximizing the Impact of Professional Development for Earth Science Teachers

This study examines the extent to which follow-up sessions can provide support for earth science teachers as they apply what they learn from professional development coursework during the academic year with their own students. Data include direct observation of follow-up sessions of courses for teachers; interviews with course co-instructors and teacher participants; and, document analysis of teacher products with a focus on the lesson plans, laboratory/activity sheets for students, and virtual field trips that teacher participants submitted and shared during follow-up sessions. Strategies are recommended to assist earth science content faculty in increasing the impact of their work with teachers and hence, student instruction

Sound Recognition of Historical Visibility: The Radio Preservation Task Force of the Library of Congress: Introduction

This issue of Journal of Radio & Audio Media serves as a gesture toward increasing attention to many untold cultural sound histories. The “question” of radio preservation, we’re just coming to realize, closely equates to our responsibility to identify gaps within our historical record, as those gaps are delineated along race, class, orientation, and gendered lines. Sound preservation turns out to be one strategy for how to reconcile failures of recognition. It’s widely accepted that a historian must not project a different meaning upon historical materials than its author intended. Yet at the same time historians might now play the role of advocates, by increasing representation through digital preservation. Sound history is one of the last frontiers to build paths of visibility among scattered records. The Radio Preservation Task Force (RPTF) of the National Recording Preservation Board of the Library of Congress represents one such project. National in scope but local in focus, the RPTF is currently in the process of constructing several interconnected initiatives that will culminate in a detailed mapping of the cultural history of radio, so as to reveal previously hidden experiences, events, and perspectives

Physical properties of solar polar jets: A statistical study with Hinode XRT data

The target of this work is to investigate the physical nature of polar jets in the solar corona and their possible contribution to coronal heating and solar wind flow based on the analysis of X-ray images acquired by the Hinode XRT telescope. We estimate the different forms of energy associated with many of these small-scale eruptions, in particular the kinetic energy and enthalpy. Two Hinode XRT campaign datasets focusing on the two polar coronal holes were selected to analyze the physical properties of coronal jets; the analyzed data were acquired using a series of three XRT filters. Typical kinematical properties (e.g., length, thickness, lifetime, ejection rate, and velocity) of 18 jets are evaluated from the observed sequences, thus providing information on their possible contribution to the fast solar wind flux escaping from coronal holes. Electron temperatures and densities of polar-jet plasmas are also estimated using ratios of the intensities observed in different filters. We find that the largest amount of energy eventually provided to the corona is thermal. The energy due to waves may also be significant, but its value is comparatively uncertain. The kinetic energy is lower than thermal energy, while other forms of energy are comparatively low. Lesser and fainter events seem to be hotter, thus the total contribution by polar jets to the coronal heating could have been underestimated so far. The kinetic energy flux is usually around three times smaller than the enthalpy counterpart, implying that this energy is converted into plasma heating more than in plasma acceleration. This result suggests that the majority of polar jets are most likely not escaping from the Sun and that only cooler ejections could possibly have enough kinetic energy to contribute to the total solar wind flow.Comment: 21 pages, 10 figures, Submitted and accepted for publishing in Astronomy and Astrophysics journa