Thesis (Ph. D.)--University of Nevada, Reno, 2007. / "August, 2007." Includes bibliographical references (leaves 268-270). Library also has microfilm. Ann Arbor, Mich. : ProQuest Information and Learning Company, [2008]. 1 microfilm reel ; 35 mm. Online version available on the World Wide Web.

Current curriculum trends promote inquiry-based student-centered strategies as a way to foster critical thinking and learning. Problem-based learning (PBL), a type of inquiry focusing on an issue or “problem,” is an instructional approach taught on the basis that science reform efforts increase scientific literacy. PBL is a constructivist approach to learning real life problems where understanding is a function of content, context, experiences, and learner goals; historical PBL situates the lesson in a historical context and provides opportunities for teaching NOS concepts. While much research exists on the benefits of historical PBL to student learning in general, more research is warranted on how teachers implement PBL in the secondary science curriculum. The purpose of this study was to examine the classroom-learning environment of four science teachers implementing a historical PBL instructional unit to identify the teachers’ understandings, successes and obstacles. By identifying teachers’ possible achievements and barriers with implementing a constructivist philosophy when executing historical PBL, educators and curriculum designers may improve alignment of the learning environment to constructivist principles. A qualitative interpretive case study guided this research study. The four participants of this study were purposefully and conveniently selected from biology teachers with at least three years of teaching experience, degrees in education, State Licensure, and completion of a PBL workshop. Data collection consisted of pre and post questionnaires, structured interviews, a card sort activity in which participants categorized instructional outcomes, and participant observations. Results indicated that the four teachers assimilated reform-based constructivist practices to fit within their preexisting routines and highlighted the importance of incorporating teachers’ current systems into reform-based teacher instruction. While participating teachers addressed a few NOS tenets, emphasizing the full range of possible NOS objectives included in historical PBL is warranted. This study also revealed the importance of creating a collaborative classroom culture and building positive student-teacher relationships when implementing PBL instruction. The four teachers agreed that the historical PBL instructional unit provided a context for learning state standards, and they positively viewed their experiences teaching the lesson. Thus findings from this study suggest that teaching science in a historical context using PBL can be effective.

Penser, représenter et étudier la nature a constitué un axe majeur du projet éducatif de l’école de la Troisième République. Pour comprendre les enjeux autour des façons de penser et d’éduquer à la nature, il est nécessaire de garder à l’esprit que la géographie, les sciences, l’histoire, l’agronomie et la littérature ont déversé une foule de savoirs et soulevé autant de questions, aux réponses parfois indisciplinées. L’essentiel pourtant n’est pas dans la recherche des contradictions que le discours a immanquablement générées. Non, il est à trouver dans le cap que les fondateurs ont tracé : éduquer et instruire. A notre sens, l’un des leviers pour atteindre ce double objectif a consisté à rendre l’enseignement le plus attractif possible. On s’en doute, les pédagogues n’ont pas été à court d’idées mais l’étude de la nature a plus que d’autres, servi à enchanter l’école républicaine. Pas toujours, pas partout évidemment : le succès et l’essor de l’Education nouvelle ne peuvent se comprendre si l’on oublie que beaucoup d’écoles dirigées par des maîtres consciencieux rechignèrent à rompre avec les méthodes et les contenus pédagogiques classiques. Cet arrachement à la tradition, l’Education nouvelle l’incarne parfaitement. Porté par le souffle de la rénovation pédagogique, ce mouvement progressiste a emboîté le pas des réformateurs de l’école traditionnelle pour faire de la nature le pivot de son enseignement… Au milieu des finalités de l’éducation à la nature à l’école, la dimension enchanteresse de la nature fut absolument centrale. Toute la littérature scolaire a participé à cette entreprise de fabrication d’une nature capable de dire la grandeur de la nation, apte à concurrencer les interprétations théologiques du monde et susceptible de faire oublier les malheurs du temps. Acharnée à former des petits républicains volontaires, l’école a également promu, avec la nature, des méthodes actives. Jardins, promenades, voyages, leçons sur le vif, géographie de terrain dessinent une école moderne, davantage en phase avec les besoins des enfants. C’est autour de ce double mouvement de construction de représentations : l’enchantement de l’école d’un côté, et une nature enchantée de l’autre, que nous avons articulé l’essentiel de notre réflexion. En gardant à l’esprit qu’il y a eu là un processus de fabrique d’une nature dont l’image – et non sa matérialité - se reflète encore dans la mémoire collective. / Thinking, representing and studying nature has been a major component of the educational project of Third Republic Schools. To understand the issues surrounding ways of thinking and educating people about nature, it is necessary to keep in mind that geography, science, history, agronomy and literature have brought out a wealth of knowledge and raised as many questions, sometimes with unruly answers. However, the essential thing is not in the search for the contradictions that the discourse has inevitably generated. No, it is to be found in the course that the founders have set: to educate and instruct. In our opinion, one of the levers to achieve this dual objective has been to make education as attractive as possible. As we can imagine, pedagogues were not short of ideas, but the study of nature has more than others served to enchant the republican school. Not always, not everywhere, of course: the success and development of new education cannot be understood if we forget that many schools run by conscientious teachers were reluctant to break with traditional teaching methods and content. This tearing away from tradition is perfectly embodied in the new Education. Carried by the wind of pedagogical renovation, this progressive movement followed in the footsteps of the reformers of the traditional school to make nature the pivot of its teaching... In the midst of the aims of nature education at school, the enchanting dimension of nature was absolutely central. All school literature has participated in this process of manufacturing a nature capable of expressing the greatness of the nation, capable of competing with the theological interpretations of the world and capable of making people forget the misfortunes of time. Hard at work training young volunteer Republicans, the school has also promoted, with nature, active methods. Gardens, walks, trips, lessons, geography of the field draw a modern school, more in tune with the needs of children. It is around this double movement of building representations: the enchantment of the school on the one hand, and an enchanted nature on the other, that we have organized the essential of our reflection. Bearing in mind that there has been a manufacturing process of a nature whose image - and not its materiality - is still reflected in the collective memory.