Traditional approaches to teacher education are increasingly critiqued for their limited relationship to student teachers' needs and for their meager impact on practice. Many pleas are heard for a radical new and effective pedagogy of teacher education in which theory and practice are linked effectively. Although various attempts to restructure teacher education have been published, no coherent body of knowledge exists about central principles underlying teacher education programs that are responsive to the expectations, needs and practices of student teachers. By analyzing effective features of programs in Australia, Canada, and the Netherlands, this study contributes an initial framework of seven fundamental principles to guide the development of responsive teacher education programs that make a difference.

ABSTRACT

Axons are traditionally considered stable transmission cables, but evidence of the regulation of action potential propagation demonstrates that axons may have more important roles. However, their small diameters render intracellular recordings challenging, and low-magnitude extracellular signals are difficult to detect and assign. Better experimental access to axonal function would help to advance this field. Here we report methods to electrically visualize action potential propagation and network topology in cortical neurons grown over custom arrays, which contain 11,011 microelectrodes and are fabricated using complementary metal oxide semiconductor technology. Any neuron lying on the array can be recorded at high spatio-temporal resolution, and simultaneously precisely stimulated with little artifact. We find substantial velocity differences occurring locally within single axons, suggesting that the temporal control of a neuron's output may contribute to neuronal information processing.

No abstract

When the right hand washes the left, the right hand comes clean too.