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Marina de Lima Tavares María-Pilar Jiménez-Aleixandre Eduardo F. Mortimer 《Science & Education》2010,19(6-8):573-598
The oral arguments of 12th grade students while solving tasks related to evolution are examined. Two groups (N = 45), taught by the same teacher, were studied during a complete teaching sequence. The paper focuses on data from the last sessions, devoted to solving problems in small groups, problems related to different dimensions of the evolutionary model. Data include video recordings, the students’ written productions and the researcher (first author) field notes. The objective is to examine the process of articulation of students’ argumentation practices with their use of evolutionary models. The results show that participants were able to apply notions such as common ancestors, radiation, or gradualism to different contexts. The arguments required the articulation of evolution notions with argumentative practices as coordinating evidence with claims at different epistemic levels. The influence of the teacher’s strategies in the students’ role is discussed. 相似文献
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Results of various studies suggest that multimedia ‘case methods’ (activities associated with case documentaries) have many
benefits in university-based teacher education contexts. They can, for example, help to ‘bridge the gap’ between perspectives
and practices held by academic teacher educators and those held by student-teachers – who may adhere to perspectives and practices
commonly supported in schools. On the other hand, some studies, along with theoretical arguments, suggest that there are limits
to the effectiveness of multimedia case methods – because, for example, they can never fully represent realities of teaching
and learning in schools. Furthermore, often missing from multimedia case methods is the student-teacher in the role of teacher. To address these concerns, we modified an existing multimedia case method by associating it with a special practice teaching
situation in a school context. Qualitative data analyzed using constant comparative methods suggest that student-teachers
engaged in this modified multimedia case method developed relatively deep commitments to encouraging students to conduct technology
design projects – a non-traditional practice in school science. Factors that appeared to influence development of this motivation
included student-teachers’ pre-instructional perspectives about science and the personalization and contextualization inherent
to the modified multimedia case method.
相似文献
Erminia PedrettiEmail: |
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Purificación Rodríguez M. Oliva Lago M. Lourdes Hernández Laura Jiménez Silvia Guerrero Sonia Caballero 《European Journal of Psychology of Education - EJPE》2009,24(4):529-543
Division-With-Remainder (DWR) problems are particularly complex, as suggested in many studies. The purpose of this work was to establish whether students’ difficulties in DWR problems came from an inadequate initial representation or from an inadequate final interpretation of the numerical answers, and whether remainders could be grouped into two blocks depending on the kind of answer, either directly matching the terms of the division or not. Forty-five Spanish secondary students, aged 12–13, were requested to solve two Types of Division Situations (i.e., Equal Groups and Comparison), each one involving four Types of Remainder (i.e., Remainder-Not-Divisible, Remainder-Divisible, Remainder-as-the-Result, and Readjusted-Quotient-by-Partial-Increments). Our data showed that: (a) the selection of the correct solution procedure depended on the Type of Division Situations, being easier in Equal Groups than in Comparison problems; (b) correct interpretations were higher than the percentages reported in other researches; and (c) success in problems whose answers were the quotient or the remainder was higher than in Readjusted-Quotient-by-Partial-Increments problems. The results obtained suggest that students’ difficulties originate in the initial representation of the DWR problems and that it would be more adequate to refer to the difficulty of Readjusted-Quotient-by-Partial-Increments problems in particular, rather than to the difficulty of DWR problems in general. 相似文献