<p>The research reported in this paper involves the use of dialogical argumentation in scientific context with 7-9 year olds as part of teaching and learning in primary classrooms. To develop an understanding of scientific concepts, four suitable collaborative activities on river pollution were used as a stimulus to effectively engage learners in scientific reasoning and use evidence for decision-making through cognitive harmonization. The research, involved four groups of five children each. Data were collected through analysis of children&rsquo / s Water Pollution Questionnaire (WPQ), classroom observation, documentation of field notes, conversations and focus group interviews. The study found that all groups were able to engage in the activities to some extent, but that good quality argumentation develops when children are familiar with working in this manner. This study sought to investigate the opportunities, possibilities and challenges associated with a dialogical argumentation teaching and learning approach in a primary school science class A mapping technique was used to analyze the children&rsquo / s discussions and identify the quality of their different &ldquo / levels&rdquo / of argument. This study confirmed that an argumentation based instruction was an effective way of enhancing learners&rsquo / understanding of river pollution. The learners&rsquo / listening skills improved tremendously and they were actively involve during discussions and provided claims with valid grounds or reasons. They were also very enthusiastic and challenged each other&rsquo / s claims during these argumentation lessons, but most of all was the enjoyment that was visible on their young faces. Further research needs to be carried out over a longer period to determine the effectiveness of an argumentation based instruction.</p>

Bakalauro darbe analizuojami penktųjų klasių mokinių adaptacijos mokykloje ypatumai. Suformuluota hipotezė, kad įgyvendinant sėkmingą mokinių adaptavimąsi į mokyklos bendruomenę, galima ugdyti teigiamas emocijas bei keisti mokinių požiūrį į mokymąsi. Tyrime dalyvavo 150 penktųjų klasių mokinių iš Vilniaus Gabijos gimnazijos, Šiaulių Gytarių vidurinės mokyklos ir Pakruojo „Žemynos“ pagrindinės mokyklos. Tyrimu nustatyta, kad dauguma mokinių teigiamai vertina naują dalykinio mokymo sistemą. Vis dėlto visuose miestuose yra penktokų, kuriems sunku adaptuotis prie didesnių reikalavimų, naujos aplinkos, naujų mokytojų, naujų draugų. Būdami mokykloje jie jaučia nerimą bei jaudulį, jaudinasi, kad ko nors nesuspės padaryti per pamokas. Rezultatai rodo, kad mažo miestelio vaikams labiausiai patinka mokytis savo mokykloje. Bet deja, kaip ir visuose miestuose, tik pusė jų jaučiasi saugūs joje. Tai galima sieti ir su patyčiomis, kurios turi didelę įtaką vaiko socialiniam gyvenimui ir adaptacijai. Reikia atkreipti dėmesį ir į tai, kad vaikai savo klasėse nėra pakankamai draugiški. Pastebima tendencija, kad kuo didesnis miestas, tuo klasės draugai vieningesni ir draugiškesni kitiems. Paaiškėjo, kad didžioji dauguma mokinių tėvų domisi kaip vaikams sekasi mokykloje, vaikai kartu su jais sprendžia iškilusias problemas ir jiems neabejotinai svarbus tėvų palaikymas. Tai turi didelę įtaką penktokų adaptacijai mokykloje. Pastebima tendencija, kad didesnių miestų vaikai mažiau bendrauja su... [toliau žr. visą tekstą] / Bachelor's analysis the features of 5th grade schoolchildren’s adaptation at school. The hypothesis tells that the successful schoolchildren’s adaptation in school community can develop their positive emotions and change their attitudes to learning. The study included 150 5th grade schoolchildren from Vilnius Gabijos gymnasium, Šiauliai Gytarių Secondary School and Pakruojis „Žemynos“ Secondary School. The study found that most 5th grade schoolchildren positively evaluate the new education system. However, there are some 5th grade schoolchildren in all cities who find it difficult to adapt to the higher requirements, new environment, new teachers and friends. Being in school, they feel the excitement and anxiety, also worry that they will not be in time during the lesson. The results show that 5th grade schoolchildren, living in a small town, most like learning in their school. But unfortunately, as in all cities, only about half of them feel safe there. This can be attributed with a bullying. It has a significant impact on the child’s social life and adaptation. It should be said that children are not sufficiently friendly in their classes. There is a tendency that the bigger the city, the more classmates are united and friendly with others. It appears that the vast majority of the schoolchildren’s parents are interested in how children are at school, children solve problems with their parents and they certainly need parental support. This has a significant impact on the of... [to full text]

Cotton, Gossypium hirsutum L., leaf grade values can significantly increase with remnants of leaf and bract materials, and can result in increased ginning costs and discounts to the producer. Cotton classed through the USDA-AMS Classing Office in Corpus Christi, Texas has reported increases in leaf grade values beginning in 2000 (USDA, 2012). The impacts of the interaction of agronomic characteristics of cotton cultivars with those of various harvest aid regimes were studied over three growing seasons, and data were used to narrow possible contributors to the observed increased leaf grade values. Multiple trials were conducted throughout the Coastal Bend and Blackland Prairie of Texas, in addition to Tifton, Georgia. Cotton was harvested, lint samples were ginned in a microgin, and lint quality was quantified with HVI. Harvest aid regimes selected provided a broad range of defoliation and desiccation, from a multiple herbicidal and hormonal modes-of-action. Defoliation levels ranged from 0 to 96% and desiccation levels ranged from 0 to 90%. Harvest aid treatments had no impact (P≤0.05) on leaf grade values for either of the years of the trials. Multiple trials were conducted in five counties in Texas, including the Lower and Upper Coastal Bend and the Blackland Prairie, and were defoliated with a uniform harvest aid treatment to identify leaf and bract morphological differences, and to determine their role in leaf grade. Multi-acre module trials were conducted with a smooth leaf cultivar and a hairy leaf cultivar to obtain leaf grade values following commercial ginning. Leaf and bract pubescence, and leaf and bract area were collected to analyze the resulting impact on cotton leaf grade values. Visual quantification of leaf and bract trichome density was quantified on 10 youngest fully-expanded leaves and 10 mid-canopy full sized bolls, respectively, when cotton was at physiological cut-out. Trichome density quantification indicated substantial variation in cultivars and discrepancies from company based rating systems. Leaf grades values generally increased with increasing trichomes densities, although not always statistically significant. In the split plot cultivar and harvest aid trial, harvest aid efficacy was similar for each of the cultivars, but cultivar trichome density was positively influence the cotton leaf grade value.

Long-term mine plans are based on forecast future metal prices. By the time the development is put in place, the forecasts may have been proved wrong and the production plan might not meet the company's financial objectives. At that point, the common reaction to this situation is to create a new revised long-term plan and spend more capital, only to find out at a later time that the metal prices have changed again. This results in an inefficient use of capital with low returns to the investors. The objective of this thesis is to develop a methodology to determine the cut-off grade and production rate of a narrow-vein underground mine such that the long-term strategic plan is robust. As a requirement to do so, it is necessary to have a good understanding of the resources, revenues, capital and operating costs as a function of the design parameters. Also, the operational limits of the mine must be determined so that the solution is practical. Afterwards, annual metal prices are randomly generated with a Monte Carlo process on stochastic metal price models, and the combination of production rate and cut-off grade yielding the highest net present value is identified and recorded. This process is repeated many times, and the probabilities of the solutions occurring at any given design combination are calculated. The results are plotted on a bubble graph, where the size of a bubble is directly proportional to the probability a solution occurs at that point. Finally, the combination with the largest bubble is the solution, as this point has the highest probability of yielding the highest net present value in most circumstances. The model was first tested on an actual gold-copper orebody where very detailed resource and cost information was available. The methodology was applied with success and the solution reflected the important impact of the copper milling and roasting process on revenues. Other tests were then done on a hypothetical gold orebody and the results showed a great degree of sensitivity to the average grade of the deposit. / Thesis (Ph.D, Mining Engineering) -- Queen's University, 2008-04-25 12:42:24.623

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This thesis offers new perspectives on the Yiddish poet and novelist Chaim Grade, examining his reflections on the world of historic Lithuanian Jewry from the outset of his career through his post-Holocaust novels. Chapter one explores the gap between the historical reality of interwar Vilna and its literary representation in his novel Di agune and questions the widely accepted view of this work as a credible historical source. / Chapter two deals with Grade's depiction of his experience as a student in a Novaredok Musar yeshiva, contrasting the depiction of this yeshiva in the poem Musernikes (1938) and the novel Tsemakh atlas (1967). The writer's shift from a fierce condemnation of the Novaredok Yeshiva to a more moderate and affectionate view as a post-Holocaust writer is explained as the older Grade's attempt to reconcile his art and identity as a modern Jew with the religious world he had forsaken.

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<p><font face="Times New Roman"> <p align="left">This study explores the effect of English as medium of instruction in Geography teaching in Grade 11. It focuses on classroom interaction where both the teachers and learners have limited proficiency in the language of instruction. It reflects on the challenges experienced by Afrikaans speaking teachers in mediating Geography lessons to isiXhosa speaking learners in Grade 11 at one secondary school in the Western Cape.</p> </font></p>

<p>The purpose of this study was to investigate parents&rsquo / and educators&rsquo / perceptions of factors influencing high rate of academic failure of learners in Clarke Estate primary schools. A quantitative, descriptive study design was used in this study. A descriptive study is used to gain information about characteristics within a particular field of study. The instrument used was a research questionnaire as it is a quick and cheap instrument to obtain a lot of information covering a large area within a relatively short time. The study population was confined to two schools in Clarke Estate. The participants were randomly selected. The sample from the two selected schools comprised twenty educators and two hundred parents. The sample was heterogeneous, comprising both male and female.</p>