46 research outputs found
The History You Don’t Know, and the History You Do: The Promise of Signature Pedagogies in History Education
The persistent separation of subject-matter content and pedagogical training in traditional teacher education programs has made it difficult for many beginning teachers to establish a base of knowledge they can use to develop pedagogical content knowledge as their careers unfold. While existing efforts to bridge this gap have focused on intensive collaborations between education faculty and their colleagues in disciplinary fields, or on the integration of disciplinary knowledge into teacher education coursework, work still can be done to address the problem of providing beginning teachers with the balance of deep and flexible content knowledge complemented by practical teaching maneuvers that so many of them crave. This chapter explores the possibility of addressing this gap via the development of signature pedagogies, following the lead established in many other professional fields, paying special attention to Lee Shulman’s conceptualization of the idea and its potential impact on teacher education in history
AGILE detection of GeV gamma-ray emission from the SNR W28
Supernova remnants (SNRs) are believed to be the main sources of Galactic
cosmic rays. Molecular clouds associated with SNRs can produce gamma-ray
emission through the interaction of accelerated particles with the concentrated
gas. The middle aged SNR W28, for its associated system of dense molecular
clouds, provides an excellent opportunity to test this hypothesis. We present
the AGILE/GRID observations of SNR W28, and compare them with observations at
other wavelengths (TeV and 12CO J=1-->0 molecular line emission). The gamma-ray
flux detected by AGILE from the dominant source associated with W28 is (14 +-
5) 10^-8 ph cm^-2 s^-1 for E > 400 MeV. This source is positionally well
correlated with the TeV emission observed by the HESS telescope. The local
variations of the GeV to TeV flux ratio suggest a difference between the CR
spectra of the north-west and south molecular cloud complexes. A model based on
a hadronic-induced interaction and diffusion with two molecular clouds at
different distances from the W28 shell can explain both the morphological and
spectral features observed by AGILE in the MeV-GeV energy range and by the HESS
telescope in the TeV energy range. The combined set of AGILE and H.E.S.S. data
strongly support a hadronic model for the gamma-ray production in W28.Comment: Accepted for publication in Astronomy & Astrophysics Letter
Writing Scientific Explanations: Effects of a Cognitive Apprenticeship for Students With LD and English Learners
Developing and Enacting Pedagogical Content Knowledge for Teaching History: An Exploration of Two Novice Teachers' Growth Over Three Years
Pedagogical content knowledge: A missing piece in the puzzle that is Religious Education in Catholic schools
Religious Education (RE) is considered a key learning area in Australian Catholic schools. Since the establishment of a separate faith-based education system in the 1850s, Religious Education has largely been the vehicle by which the Church has transmitted the Catholic Christian tradition across generations. Religious Education in Australian Catholic schools involves learning about religion and participating in the Catholic tradition with the aim of developing students as religiously literate people of faith