Bibliography: leaves 395-473. / xxiii, 473 leaves : ill. (chiefly col.), maps (some col.) ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Research is directed toward demonstrating spatial variability in dust lead contamination patterns both statically and dynamically within the confines of vacant test houses, thus eliciting specific entrance pathways. / Thesis (Ph.D.)--University of Adelaide, Mawson Graduate Centre for Environmental Studies, 1999

Includes bibliographical references. / xvi, 201, [35] leaves : ill. ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / An introduction to the general topic of lead as an environmental contaminant and a critical review of epidemiloogical evidence of lead exposure and neuropsychological (particularly cognitive) development, a description of the research design and methods, and an evaluation of the validity of the precision of the study. / Thesis (Ph.D.)--University of Adelaide, Dept. of Community Medicine,1995

The purpose of this study was to describe how manipulatives facilitated the growth of one group of high school students' mathematical understanding of combinatorics and Pascal's Triangle. The role of manipulatives in mathematics education has been extensively studied, but much of the interest in manipulatives is focused on the general uses of manipulatives to support student learning. Unfortunately, there is a lack of research that explicitly defines how manipulatives can help students develop mathematical understanding. I have chosen to examine mathematical understanding through the lens of the Pirie-Kieren Theory for Growth of Mathematical Understanding. Through analysis of the students' explorations of the Towers Task, I identified ways in which manipulatives facilitated students' understanding of combinatorics and Pascal's Triangle. It was found that the properties and arrangements of the manipulatives were significant in prompting students' progression through levels of understanding and helped students to reason abstractly and develop mathematical generalizations and theories. From this study we can gain insights into explicit ways in which manipulatives facilitate mathematical understanding. These results have implications for research, teaching and teacher education.

Includes bibliographies. / xiv, 233, [102] leaves : ill. ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / This thesis examines the relationship between environmental lead exposure and later emotional and behavioural problems experienced by 11-13 year old children enrolled in the Port Pirie Cohort Study (PPCS). The PPCS is the first study to monitor prospectively the association between lifetime blood lead exposure and children's behaviour. Prenatal and postnatal measures of lead exposure are collected from birth along with a large number of biomedical, socio-environmental and familial factors that might confound the relationship between lead exposure and children's behaviour. / Thesis (Ph.D.)--University of Adelaide, Dept. of Psychiatry, 1997

This thesis deals with the history of the amaHleke people and Pirie Mission, which have become so closely associated that they cannot be separated. It covers the period from the time of Chief Hleke to 1967, the year in which the amaHleke cheiftainship was resuscitated. The first chapter relates the origin of the amaHleke, from the time of Hleke himself (17th century) to Jwarha (about 1820). It explains the relationship between the different branches of the Hleke royal line, and it covers the Hleke settlement at the Mgqakhwebe river. The second chapter deals with the establishment of Pirie Mission by the Presbyterian missionaries John and Bryce Ross. It discusses the various aspects of the mission operation, and explains why and how the amaHleke opposed it. But the situation changed as a result of the 1850-3 Frontier War. Whereas the other Xhosa were expelled from their lands, the Hleke connection with Pirie Mission enabled them to stay on. The Hleke were therefore united with the mission, whether they liked it or not. The remainder of the chapter describes the educational and cultural changes which the mission imposed on them. The third chapter covers economic change at Pirie. Like other mission stations, it was converted from communal to individual land tenure. This was opposed by Chief Jwarha as a blow to his authority, but it did not result in the growth of a peasant class. The chapter concludes with the implementation of betterment in 1963. The fourth chapter explains what happened to the mission after the death of Bryce Ross. The Ross missionaries had frustrated black aspirations in teh church. This was especially frustrating to Burnet and Ntsikana Gaba, the great-grandsons of the prophet Ntsikana. Burnet broke away under the banner of the "Wee Free" branch of the Church of Scotland. This church also could not accommodate Burnet's aspirations. The remainder of the chapter deals with educational developments, with an emphasis on the introduction of Bantu Education. The last chapter deals with the political history of Pirie after the death of Chief Jwarha. The Cape government tried to replace chieftainship by a headman and a Village Management Board. But the Board did not function satisfactorily, and it was scrapped in 1921. Pirie continued to be administered by headmen. Applications for the revival of chieftainship were turned down, partly because there was no agreement on Jwarha's heir. However, this was finally resolved in 1967 with the appointment of Chief Pani Busoshe.

The purposes of this study were to investigate sixth grade students&rsquo / understanding of multiplication of fractions in terms of the Pirie&ndash / Kieren Model of Understanding in the light of use of multiple representations and to improve mapping feature of the current theory to increase depicting power of the maps produced. One of the qualitative research methods, case study design was used. This study was conducted with two sixth grade students at a public school in Etimesgut, Ankara in the spring semester of 2009-2010. Students learnt fractions. They completed activity sheets during the lessons. They completed self-evaluation forms and wrote journals just after the instruction. After that semi- structured interviews were conducted with two students in order to analyze their understanding about multiplication of fractions. The data collected from interviews were used to reveal understanding maps of each student. Moreover, the data from activity sheets, student journals, observations, and self-evaluation forms were used to strengthen the findings from the interviews. This study showed that there was a relationship between students&rsquo / preference on the use of different type of representations and attained understanding level of multiplication of fractions. It was also found that establishing connection between multiplication of fraction concept and real life usage of these concepts and extending whole number multiplication to the multiplication with the fractions were acted as an obstacle for understanding the multiplication of fractions. In the current study, it was seen that there was a relationship between question type and students use of representations. Moreover, teachers should use different type of representations in their classrooms more frequently in order to help students to reach higher level of understandings. Teachers should also connect new ideas to what the students have already learned for deeper understanding of them.