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The practice of providing totally inclusive schools to meet the needs of all learners is one of the emerging service delivery options gaining widespread support in public education in Canada and the United States. While many elementary schools have taken the initiative and established successful models of full inclusion, secondary schools, in part because of the historical-structural characteristics of these organizations, embody different and perhaps more complex problems in meeting the demands of inclusive educational practices. In this article, we draw on data from a study of two secondary schools in Nova Scotia, Canada, and their attempts to accommodate students with widely diverse needs in regular classrooms. Drawing primarily on teacher interview data, the paper reports on the ways teachers made sense of and adapted to, structural changes that took place in each school

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ELEVEIN FIGURESAlthough the atrophy and resorption of the tadpole tail during metamorphosis have been the subject of histological investigations little is known of the behavior of the nerve fibers during the early stages of the process. This gap in our knowledge is due to difficulties encountered in the application of the silver impregnation methods to amphibian material. Indeed, with the exception of a rather brief paper by Sanchez ('32) with the Cajal technique, the present writer does not know of any work in which the nerves of the tadpole tail have been demonstrated with silver.According to Sanchez, there is early fragmentation of the axons in the caudal portion of the spinal cord and the peripheral nerves connected with it. He suggests that the nervous system of the tail becomes inactive a t the beginning of atrophy and that "son inaction determine le manque d' excitation fonctionelle des organes sujets au processus hixtolytique, les-(pels, se trouvant de la sorte priv6s de son action directriee, regulatrice, viennent B p6rir" (p. 303). The observations of Sanchez required confirmation becauseif it is true that the caudal nervous system is not functional at the onset of metamorphosis, the disintegration of the tissues subject to its influence, specially the musculature, would ' Based upon a thesis submitted t o the Graduate School of Cornell University in partial fulfillmeiit of the requirements for the degree of Doctor of Philosophy. 79

1. Groups of trout fry of the same parentage were grown in environments where the following factors were controlled: temperature, amount and intensity of illumination, rate of water flow, aeration and chemical composition of the water, amount of living space and quality of food supply. They were allowed to eat as much as they would, and individual weights were recorded during the first 8 months after the beginning of feeding. 2. There was soon an increase in the range of individual weight in each group of fry, and thereafter the larger fry grew faster than smaller ones. When the larger fry were removed, the smaller ones grew at an increased specific rate, and when larger fry were added, the smaller ones grew more slowly. It is suggested that a ‘size hierarchy’ was established within each group, and an individual's specific growth rate depended on its position in the order of decreasing weight. 3. There was an optimum degree of crowding for maximum productivity. Compared with the fry in this group, the specific growth rates of individuals in larger, more crowded groups depended on the number of fish of larger size, while in smaller, less crowded groups, individuals grew at rates depending on the proportion of fish which were larger and smaller. 4. Alevin weight had little effect on the specific growth rates of fry. 5. There were differences between the growth histories of fry derived from alevins of the same weight and descended from the same father but different mothers (all of the same stock, age and size). 6. The specific growth rates decreased as the fry grew older, but there was no correlation between body weight and specific growth rate, except for the size hierarchy effect within each group. This effect had a greater influence on the size of individual fry than had either alevin weight or heredity.

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