Assessing preservice teachers' competence as a Virtual Schooling site facilitator

Given the rise of distance learning engaging K-12 students and the importance of the role of the Virtual Schooling Site Facilitator (VSSF) to support these students in K-12 schools, it is important to prepare all teachers for this role (Davis & Niederhauser, 2007). This paper reports a scientific experimental study of curriculum for this preparation for use in preservice programs and finds that both the elementary and secondary Virtual Schooling labs of the 'Teacher Education Program Goes into Virtual Schooling' project are effective

Potentialités de la télédetection rapprochée dans les domaines optique et thermique pour la cartographie d'attaques parasitaires sur culture

National audienc

Gaeumannomyces graminis, the take-all fungus and its relatives

Take-all, caused by the fungus Gaeumannomyces graminis var. tritici, is the most important root disease of wheat worldwide. Many years of intensive research, reflected by the large volume of literature on take-all, has led to a considerable degree of understanding of many aspects of the disease. However, effective and economic control of the disease remains difficult. The application of molecular techniques to study G. graminis and related fungi has resulted in some significant advances, particularly in the development of improved methods for identification and in elucidating the role of the enzyme avenacinase as a pathogenicity determinant in the closely related oat take-all fungus (G. graminis var. avenae). Some progress in identifying other factors that may be involved in determining host range and pathogenicity has been made, despite the difficulties of performing genetic analyses and the lack of a reliable transformation system.Peer reviewe