电位滴定法测定吡啶－三苯基硼中硼的含量

利用自动电位滴定法测定化工产品吡啶－三苯基硼中硼的含量。对消解体系中硝酸－硫酸比例、温度、消解时间等条件,以及硼酸酸性强化剂甘露醇用量等进行了优化。在优化的消解和电位滴定条件下,测得本批次产品中硼的平均值含量为3．32％,纯度为98．52％。方法标准偏差为9．97％,回收率91．9％～109．6％。此方法简单、方便可行,测定结果稳定。     

高职“外贸单证制作实务”课程考核方式改革与设计

以＂外贸单证制作实务＂课程的考核方式为例,对职业资格考证条件下的课程考核方式的改革进行了研究和探索,综合分析了课程考核方式改革的客观必然性和原则,设计了＂外贸单证制作实务＂课程考核新的考核方式模型,并完善该课程的考核评价体系。     

可见光响应微晶TiO2的低温制备与表征

以钛酸四丁酯为原料,在高浓度的硝酸溶液条件下,采用低温水解方法合成微晶TiO2光催化剂,分别采用XRD、FITR、SEM、TEM、PL等测试技术对催化剂进行了表征。实验结果表明:在低温85℃条件下,加入65 mL硝酸可以制得结构和形貌不同的TiO2微晶,该材料在225 nm波长诱导下表现出420 nm的发光性能。所得TiO2微晶60 min之内可在太阳光照射条件下将25 mg/L的甲基橙完全分解。     

Recruiting and retaining secondary mathematics teachers: lessons learned from an innovative four-year undergraduate program

In response to the critical shortage of qualified mathematics teachers in the U.S., the TIME 2000 Program was created with funds from the National Science Foundation, at Queens College of the City University of New York. Now institutionalized, the program is designed to support the recruitment, preparation, and retention of prospective teachers through a close-knit learning community in which participants experience an innovative and multifaceted program for their four years of undergraduate study. This article describes the innovative aspects of the program that show promise of preparing highly competent teachers whose careers span a lifetime. Short- and long-term strategies for recruiting students from high school are described as well as the program components that are designed to increase retention of candidates in the program and in teaching.

Transformative education for culturally diverse learners through narrative and ethnography

This article presents a study of the effects of creating a bridge between the narrative and ethnographic methods and writing processes as a means to more effectively educate teachers of culturally diverse learners. Ten teacher participants from a Masters of Education (M.Ed.) degree program in Bilingual Education at a university in the northwestern United States took a sequence of courses in which instructor-researchers taught them narrative and ethnographic pedagogy, theory, and methodology. Through qualitative methods, instructor-researchers analyzed teacher participants’ personal narratives and ethnographic case studies for generative themes. In discovering the commonalities of themes between these two methods of inquiry, the research reveals the value and transformative nature of building a bridge between narrative and ethnographic methods. The following overlapping generative themes were voiced by teacher participants: (1) awareness of self and others; (2) consciousness of educational issues and their implications; (3) transformative action and advocacy. These themes are substantiated with related literature and further elucidated upon in the paper.     

As the climate changes: Intergenerational action-based learning in relation to flood education

It is a concern that children represent an under-researched group in flood education and preparedness because as adults they are more likely to experience flooding as the climate changes, and because it suggests their potential today, as agents of change, is being undervalued. Using action-based, participatory methodology with seven to nine-year-old children, a creative and inclusive flood education resource was developed as a stimulus for learning. Evaluation revealed that young children can learn about flooding and preparedness, and that intergenerational learning from child to parent can also occur, with children transferring the messages learned in school to home. However, thematic analysis suggests key factors such as family relationships (empowerment of children) and the parents’ disconnection and dissociation from risk limit the success of intergenerational learning. The implications of these in relation to flood education, flood preparedness, and household resilience levels are explored.     

A comparative study of two pre-service teacher preparation programmes in the USA and Romania

This article presents an overall exploratory comparison of two specific pre-service teacher preparation programmes at two research-intensive institutions of higher education in the USA and Romania. The main conclusions suggest that US and Romanian teacher candidates differ very little in their ratings of their respective programmes in terms of learning in the programme, preparation for general teaching and twenty-first century skills. The largest differences were recorded for the university supervisor and cooperating teacher constructs, which the US teacher candidates rated considerably higher than their Romanian peers, namely in the quality and extent of applied field and clinical experiences, which merit further exploration.     

Preparing teachers as allies in Indigenous education: benefits of an American Indian content and pedagogy course

The study explores relationship building and improvements in knowledge, skills, and dispositions of pre-service teachers enrolled in an Indigenous education content and pedagogy methods course. The Teaching American Indian Students in the Elementary Classroom course stands alone from other diversity education offerings at the University of Minnesota Duluth and is a required learning experience. Pre-service teachers are provided with essential knowledge and learning opportunities that facilitate success in working with Indigenous students, and helping mainstream students learn about Native history, peoples, and communities. The evaluation study was conducted by an Indigenous faculty member interested in learning how non-Native teacher education students felt they were achieving target knowledge, skills, and dispositional goals. Three separate groups of teacher education students completed both pre and post online surveys as a part of a three-year mixed methods evaluation study. The study shows significant gains made by pre-service teachers in each of the target areas, and affirms that methods coursework in American Indian education can lead to more interculturally competent teacher candidates. Helping teacher education students develop the requisite abilities and dispositions to fulfill Native American education objectives is contributory to developing future teachers as competent professionals and allies in Indigenous and diversity education.     

Reflections on Equipping Candidates to Teach Literacy in Culturally Diverse Schools

Abstract

This essay reflects on ways to equip teacher candidates so they are not only prepared to answer tough questions, but are educated for the linguistic and literacy challenges of today’s classrooms. We recognize that with an ever-growing majority minority population, it is time to change the teacher preparation system, and to support current teachers and the preparation of future teachers for the field; these changes need to be soon and are imperative.     

Preliminary Study: Special Education Doctoral Students’ Perceptions of Self-determination

This preliminary study investigated 118 special education doctoral students’ knowledge of and attitudes toward self-determination. In addition, this study examined the relationship between self-determination coursework and special education doctoral students’ perceptions of how well they were prepared for implementing self-determination in their future careers. The results indicated that although the majority of respondents possessed adequate knowledge of self-determination concepts, they reported lacking confidence in identifying how it can be taught and assessed. Most of the respondents indicated that they would integrate self-determination knowledge and skills into their future teaching; however, more than one-half of the doctoral students felt that they were unprepared with regard to the instruction of self-determination. Also, the findings indicated that there were statistically significant relationships between pre-service courses and doctoral students’ perceptions of self-determination. The results of this study showed a gap in current doctoral students’ knowledge about self-determination and confidence related to application within pre-service teaching.