Effect of the implicit combinatorial model on combinatorial reasoning in secondary school pupils

Elementary combinatorial problems may be classified into three different combinatorial models (selection, partition and distribution). The main goal of this research was to determine the effect of the implicit combinatorial model on pupils' combinatorial reasoning before and after instruction. When building the questionnaire, we also considered the combinatorial operation and the nature of elements as task variables. The analysis of variance of the answers from 720 14–15 year-old pupils showed the influence of the implicit combinatorial model on problem difficulty and the interaction of all the factors with instruction. Qualitative analysis also revealed the dependence of error types on task variables. Consequently, the implicit combinatorial model should be considered as a didactic variable in organising elementary combinatorics teaching.     

一位美国老教师的生活与工作美国老师给编辑部的一封来信(三)

Virginia Hurt Bailey(美国) 阅读课第二部分是专题阅读。在这段时间里,学生阅读学术文章,读后用自己的话进行复述。阅读课的第三部分是文学精粹选读。10点40分-10点50分是课间休息。星期二和星期三,在这段时间里,我要在操场上值班,以防学生在活动时出问题。     

Getting Everyone to the Fair: Supporting Teachers in Broadening Participation in Science and Engineering Fairs

Journal of Science Education and Technology - Science and Engineering (S&E) fairs are a valuable educational activity and are believed to increase students’ engagement and learning in...     

Grammar and the lexicon: developmental ordering in language acquisition

Recent accounts of language acquisition propose that the knowledge structures that comprise language develop within a single, unified system that shares computational resources and representations. One implication of this approach is that developmental relations within the system become central to theorizing about language acquisition. Previous work suggested that lexical development preceded grammatical development, a developmental ordering with strong theoretical implications. One purpose of the current article is to test this developmental ordering hypothesis. Results showed that children (aged 16-30 months) developed lexicon and grammar synchronously. The second purpose is to demonstrate a recently developed method for testing developmental ordering, the nonlinear-mapping approach, and show how the method can be extended to capitalize on multiply determined developmental systems, such as language.     

Does chroma on the line increase attention to the line in pigeons?

Two groups of pigeons received differential discrimination training on the presence vs absence of a vertical line on a white surround. The line was green for one group and black for a second group. Generalization tests along the angularity dimension showed that both green and black lines produced equally steep gradients. The results suggested that the addition of chroma to the line does not increase attention to the line.     

Individual differences in children's writing: A function of working memory or reading or both processes?

The purpose of this study was to investigate whether a general or specific working memory (WM) system is related to writing and whether individual differences in reading and/or processing efficiency underlie the correlations between WM and writing. Two studies correlated WM with writing (Test of Written Language-TOWL) and reading measures. In Study 1, WM was correlated significantly with a number of writing measures, particularly to those measures related to text generation. Working-memory also contributed unique variance to writing, beyond what is predicted by reading comprehension. Study 2 compared the correlations of verbal and visual-spatial WM measures with the TOWL under initial and enhanced memory processing (dynamic assessment) conditions. The coefficients were statistically comparable between initial and enhanced processing conditions, suggesting that individual differences in processing efficiency do not account for the correlations between WM and writing. Overall, the results indicated that (a) WM measures contribute unique variance to writing, especially text generation, and (b) working memory performance improves under gain conditions, but this enhanced processing efficiency did not appear to mediate the links between WM and writing. Taken together, the two studies support a general capacity explanation for the relationship between working memory and text generation.     

Enhancing the quality of early childhood education: A follow-up evaluation of an experiential, collaborative training model for head start

The study is a follow-up evaluation of a Collaborative Training curriculum for Head Start. The previous curriculum was enhanced by adding parent exemplars and demonstrations in trainees' classrooms. Two Head Start teachers and two parent volunteers from each of 70 classrooms were randomly assigned to either the enhanced Collaborative Training (CT) or Workshop Training (WT) approach. CT teachers and parents were involved conjointly in experiential training that included receiving guided practice and feedback from exemplary peers. WT consisted of a series of workshops conducted by outside trainers for separate groups of parents and teachers. Training methods were compared with respect to (a) trainees' reports of satisfaction with training and collaboration, and (b) observed levels of adult-adult and adult-child classroom interactions. CT teachers and parents reported significantly greater levels of satisfaction with the training, as well as significantly greater levels of collaboration than WT participants. Teacher-teacher and parent-teacher observations indicate that CT trainees showed higher levels of positive classroom interactions than WT trainees. With respect to adultchild classroom interactions, CT teachers demonstrated significantly more praise, supportive physical contact, and positive interactions in instruction than WT teachers. CT parents showed higher levels of adult-child classroom interactions across all observed categories compared to their WT counterparts. Implications of these findings for further research were discussed.     

Computer conferencing: A new medium for investigating issues in gender and learning

Claims have been made that computer mediated communication (CMC) is a potentially highly participatory and democratic medium because it reduces the requirement to interrupt or wait your turn to speak. Such aspects of discussion have been shown to be relevant to differences in male and female participation in group discussions. In general, men have been found to take more turns and to speak longer than women in mixed sex groups. Men are also said to characteristically speak about things, take centre stage and give opinions. Women on the other hand are more likely to emphasis people rather than things, and to build and maintain relations in the way they talk. These two styles have been described as report talk of men and rapport talk of women.In this paper we describe some preliminary findings on the impact of using CMC and its effect on traditional gender participation differences. We look first at turn taking by men and women in computer conferences, and then how women in particular experience differences in the kind of contributions made to the conferences by men and women. Finally, we look at the actual contributions made by men and women and the extent they differ from each other.     

Motivation coaching training for instructional coaches: a pilot study of motivational interviewing skills training

In our paper we describe a newly developed teacher coaching model that provides training on motivational interviewing (MI) to improve instructional coaches’ effectiveness with classroom teachers. Participants were 38 coaches who completed a three-day coaching training. At pre- and post-test, the participants completed role plays with an actor who played the role of a new teacher. Then, these sessions were coded for MI-consistent behavior. The results of our study revealed that the majority of the coaching conversations were inconsistent with effective MI. At baseline, conversations were primarily characterized by questions (60%) followed by attempts to persuade without permission (20%). Following training, coaches did not change their conversational style. Because an MI-inconsistent conversation style is associated with decreased self-efficacy and motivation for change, the findings suggest a need to help coaches develop interactions that are more consistent with best practices of MI.