The Oil Drop Experiment: Do Physical Chemistry Textbooks Refer to its Controversial Nature?

Most general chemistry textbooks consider the oil drop experiment as a classic experiment, characterized by its simplicity and precise results. A review of the history and philosophy of science literature shows that the experiment is difficult to perform (even today!) and generated a considerable amount of controversy. Acceptance of the quantization of the elementary electrical charge was preceded by a bitter dispute between R.A. Millikan and F. Ehrenhaft, that lasted for many years (1910–1925). The objective of this study was to investigate whether physical chemistry textbooks refer to the controversial nature of the experiment. Based on six criteria developed previously, 28 physical chemistry textbooks were evaluated. Analysis of the texts using six identified criteria demonstrated that the textbooks neither referred to the controversial nature of the experiment nor recognized the difficulty of the experimental procedure. Only a few texts even attempted to include any discussion of the history or philosophy of the experiment. The instructor of a physical chemistry course could include aspects of the Millikan–Ehrenhaft controversy to motivate classroom discussion and help facilitate an understanding of the role that controversy has in scientific progress.     

How Journalists and Social Media Users Perceive Online Fact-Checking and Verification Services

While services for fact-checking and verification to counter fake news in social media have increased, little research has investigated how journalists and the public perceive such services. This study reflects the outcomes of REVEAL, a three-year European Union research project investigating the use and impact of services for fact-checking and verification. Based on interviews with 32 young journalists and content analysis of social media users’ online conversations, we contribute new knowledge about the ways that journalists and social media users perceive online fact-checking and verification services. The findings suggest that, while young journalists were largely unfamiliar with or ambivalent about such services, they judged them as potentially useful in the investigative journalistic process. Yet, they were unwilling to rely exclusively on these tools for fact-checking and verification. A comparison of journalists’ perceptions with those of social media users reveals social media users are similarly ambivalent. Some accentuated the usefulness of such services, while others expressed strong distrust. However, the journalists displayed a more nuanced perspective, both seeing these services as potentially useful and being reluctant to blindly trust a single service. Design strategies to make online fact-checking and verification services more useful and trustworthy are suggested.     

Online Faculty Development and Assessment System (OFDAS): A Study of Academic Learning

The rapid growth of online learning has led to the development of faculty inservice evaluation models that are geared towards the demands of quality improvement of degree programs. Based on the best practices of student online assessment, the Online Faculty Development and Assessment System (OFDAS) created at the Canary Islands was designed to serve the dual purpose of faculty development and classroom learning environment assessment. Results of analyses showed that OFDAS maximized the potential of online faculty development to encourage staff to reflect on Curriculum and Teaching Capacities (CTC). Implications were discussed in terms of emphasizing the process of online CTC learning and incorporating perspectives to capture a comprehensive view of faculty teaching attitudes and their association with student classroom learning perceptions.     

Difficulties in Learning Thermodynamic Concepts Are They Linked to the Historical Development of this Field?

Students' misunderstanding of basic thermodynamic concepts is analysed on historicalgrounds. The persistence of some ideas from the caloric model are found to be reinforced bymagnitude names and unit definitions that were brought up at the early stages of thermodynamic development. The failure of many popular textbooks to make a clear distinction between internal energy and heat is also explored and related to Students' learning difficulties. Some hints that may help to improve Students' understanding are presented.     

Participants’ views of the use of video in lesson study in higher education in Spain: An exploratory multiple case study

Abstract

Lesson study (LS) is a process through which teachers design, teach and discuss a lesson collaborating with colleagues. Sometimes, it includes video recording the lesson so teachers can use videos to later discuss the lesson and its improvement, however, there is little research addressing the consequences of doing it. This article investigates participants’ perceptions and use of video within LS. Results show that participants perceived video in LS as viable and with potential to stimulate reflection and to improve lessons, but also evince that video affects the outcomes, management and sustainability of LS. We analyze and discuss its potential and the challenges it poses, suggesting ideas for its implementation.     

Key challenges and future directions for educational research on scientific argumentation

At the 2015 NARST: A Worldwide Organization for Improving Science Teaching and Learning Through Research Annual International Conference, a group of scholars held an extended pre‐conference workshop to discuss key challenges and future directions faced by argumentation researchers around the world. This wide‐ranging group of facilitators and participants represented varying perspectives and experiences with argumentation research. Learning artifacts from the workshop were collected and analyzed utilizing multiple qualitative coding techniques. Analysis of these artifacts revealed five major themes that emerged from the NARST workshop describing this group of scholars’ views on current issues and potential directions for the field of argumentation research. These themes center on: (i) establishing a classroom culture that values argumentation; (ii) how differing theoretical frameworks challenge how researchers communicate findings; (iii) the challenge of assessing various aspects of scientific argumentation in a valid and reliable fashion; (iv) pedagogical challenges in supporting student discourse and social collaboration; and (v) challenges concerning the professional development of teachers. Each of these themes is described using direct quotes from the workshop artifacts, and implications for future research in argumentation are discussed. © 2017 Wiley Periodicals, Inc. J Res Sci Teach 55: 5–18, 2018     

On the World Bank's education report: Replies to Peter Williams

Viewpoints and Controversies

On the World Bank's education report: Replies to Peter Williams     

V + H: Hybrid architecture for DSS and OLTP

Previous research has been done to identify the best pragmatic approach that DBMSs must follow to manage different workloads. Some approaches have followed the “One size fits all” approach, trying to incorporate all features in a row-oriented DBMS (also called horizontal) to manage both OLTP and DSS workloads. Additionally, there have been specialized DBMS, following a columnar approach (also called vertical), that focuses on the growing demand to efficiently manage DSS workloads. This paper proposes a combination of both vertical and horizontal DBMS to best manage OLTP and DSS workloads. We have used mature, commercially available products from a single vendor and developed a custom middleware Decision Query Module that identifies the best option for most efficient execution of a query. This V + H architecture also offers the functionality of a mirrored DB without paying twice for storage.     

The Effectiveness of Concept Maps in Teaching Physics Concepts Applied to Engineering Education: Experimental Comparison of the Amount of Learning Achieved With and Without Concept Maps

A study was conducted to quantify the effectiveness of concept maps in learning physics in engineering degrees. The following research question was posed: What was the difference in learning results from the use of concept maps to study a particular topic in an engineering course? The study design was quasi-experimental and used a post-test as a measuring instrument. The sample included 114 university students from the School of Industrial Engineering who were divided into two equivalent homogeneous groups of 57 students each. The amount of learning attained by the students in each group was compared, with the independent variable being the teaching method; the experimental group (E.G.) used concept maps, while the control group (C.G.) did not. We performed a crossover study with the two groups of students, with one group acting as the E.G. for the topic of optical fibers and as the C.G. for the topic of the fundamental particles of matter and vice versa for the other group. For each of the two topics studied, the evaluation instrument was a test of 100 dichotomous items. The resulting data were subjected to a comparative statistical analysis, which revealed a significant difference in the amount of learning attained by the E.G. students as compared with the C.G. students. The results allow us to state that for the use of concept maps, the average increment in the E.G. students’ learning was greater than 19 percentage points.