Despite it being the second decade of the 21st century, there still exists a range of definitions of what a 21st century learning environment is. This can be troublesome for teacher educators as we strive to prepare teachers for environments we can't clearly describe. In order to describe a 21st century learning environment, we developed an IC Map based on the Concerns-Based Adoption Model of Change (CBAM). Results indicate that 21st century skills can be manifested in the learning environment through content-based and project-based approaches, but of equal importance is having a 21st Century Ecology. Implications of this study extend to teachers, teacher educators, and school administration.

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A radioimmunoassay for insulin, together with ultrastructural observations of the endocrine pancreas, were utilized to investigate developmental aspects of insulin storage and secretion in the chick embryo. Immunoreactive insulin was detected from the fifth embryonic day onwards, in both the pancreas and blood plasma. In addition, margination of well-developed beta granules, and emiocytotic events were observed as early as the fifth embryonic day. The initial appearance of insulin, together with its subsequent developmental profile, correlate well with major metabolic events occurring in the embryonic chick, and are discussed in relation to a functionally responding system, the developing liver. The present data show that the chick endocrine pancreas has the potential for activity very early in development, and that insulin may be secreted at earlier embryonic stages than hitherto accepted.

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