An investigation on the effects of using interactive digital video in a physics classroom on student learning and attitudes

Interactive digital video provides students with control of computer visualization techniques and allows them to collect, analyze, and model two-dimensional motion data. Activities that use these techniques were developed for students to investigate the concept of frames of reference in various real-life situations. This investigation examines the effect on student learning and attitudes of using these materials in an introductory college physics course. The study measured students' computer attitudes and found improvement in students' feelings of comfort in using computers after completion of the activities. We found students' prior computer experience did not influence their perceptions of the activities. The majority of participants perceived discussion and the computer visualization techniques as being very effective in helping them learn, Students' understanding of the physics concepts were assessed and the participants' scores were compared with nonparticipants' scores. Although analysis of variance statistical procedures revealed no significant differences between the two groups, the results of this study indicate that sophisticated instructional video software can be perceived as easy to use and effective by students who are novices and experts in using computers. Thus, interactive digital video tools and activities have the potential to provide physics teachers with the latest technology to bring the active process of learning physics to their classroom. © 1997 John Wiley & Sons, Inc. J Res Sci Teach 34: 467–489, 1997.     

Use of interactive live digital imaging to enhance histology learning in introductory level anatomy and physiology classes

Histology is one of the main subjects in introductory college-level Human Anatomy and Physiology classes. Institutions are moving toward the replacement of traditional microscope-based histology learning with virtual microscopy learning amid concerns of losing the valuable learning experience of traditional microscopy. This study used live digital imaging (LDI) of microscopic slides on a SMART board to enhance Histology laboratory teaching. The interactive LDI system consists of a digital camera-equipped microscope that projects live images on a wall-mounted SMART board via a computer. This set-up allows real-time illustration of microscopic slides with highlighted key structural components, as well as the ability to provide the students with relevant study and review material. The impact of interactive LDI on student learning of Histology was then measured based on performance in subsequent laboratory tests before and after its implementation. Student grades increased from a mean of 76% (70.3-82.0, 95% CI) before to 92% (88.8-95.3, 95% CI) after integration of LDI indicating highly significant (P < 0.001) enhancement in students' Histology laboratory performance. In addition, student ratings of the impact of the interactive LDI on their Histology learning were strongly positive, suggesting that a majority of students who valued this learning approach also improved learning and understanding of the material as a result. The interactive LDI technique is an innovative, highly efficient and affordable tool to enhance student Histology learning, which is likely to expand knowledge and student perception of the subject and in turn enrich future science careers.     

Integrating Laptop Computers into Classroom: Attitudes, Needs, and Professional Development of Science Teachers—A Case Study

The study examines the professional development of junior-high-school teachers participating in the Israeli “Katom” (Computer for Every Class, Student and Teacher) Program, begun in 2004. A three-circle support and training model was developed for teachers’ professional development. The first circle applies to all teachers in the program; the second, to all teachers at individual schools; the third to teachers of specific disciplines. The study reveals and describes the attitudes of science teachers to the integration of laptop computers and to the accompanying professional development model. Semi-structured interviews were conducted with eight science teachers from the four schools participating in the program. The interviews were analyzed according to the internal relational framework taken from the information that arose from the interviews. Two factors influenced science teachers’ professional development: (1) Introduction of laptops to the teachers and students. (2) The support and training system. Interview analysis shows that the disciplinary training is most relevant to teachers and they are very interested in belonging to the professional science teachers’ community. They also prefer face-to-face meetings in their school. Among the difficulties they noted were the new learning environment, including control of student computers, computer integration in laboratory work and technical problems. Laptop computers contributed significantly to teachers’ professional and personal development and to a shift from teacher-centered to student-centered teaching. One-to-One laptops also changed the schools’ digital culture. The findings are important for designing concepts and models for professional development when introducing technological innovation into the educational system.     

Sharing,Talking, and Learning in the Elementary School Science Classroom: Benefits of Innovative Design and Collaborative Learning in Computer-Integrated Settings

Impact on student achievement of randomly assigned students working individually or collaboratively in mixed- and matched-gender pairs at a computer on predetermined science tasks was investigated. Collaborative dyads shared a computer and screen as each operated an independent keyboard and mouse. A mixed gender control group working individually at their respective computers was used for comparison purposes. A software application was designed to facilitate collaborative work and track the quantity of text written by users and their respective use of time. A final written assessment was conducted to compare the level of academic achievement between the control group and the experimental. A significant difference in academic achievement resulted.     

Does the lack of hands-on experience in a remotely delivered laboratory course affect student learning?

Educators question whether performing a laboratory experiment as an observer (non-hands-on), such as conducted in a distance education context, can be as effective a learning tool as personally performing the experiment in a laboratory environment. The present paper investigates this issue by comparing the performance of distance education students with their on-campus counterparts in a junior-level fluid mechanics laboratory course over a three semester period. Using digital recording methods, the on-campus versions of the laboratory experiments were formatted to accommodate distance-education students who did not have access to campus facilities. This paper compares the assessment of student performance in demonstrating both learning of technical concepts and the ability to describe these in an effective written laboratory report.     

The reverse modality effect: Examining student learning from interactive computer‐based instruction

The purpose of this study was to explore the effects of modality on learning from multimedia instruction. This study utilized a factorial between‐subject design to examine the effects of modality on student learning outcomes, study patterns and mental effort. An interactive computer‐presented diagram was developed to teach the places of articulation in human speech. A total of 151 undergraduate students at a large southwestern university in USA participated in this study. Participants were randomly assigned to one of two modality conditions (ie, written text and spoken text). Data were obtained through surveys, student logs and knowledge tests. Findings revealed a reverse modality effect, wherein participants who studied with written text outperformed those who studied with spoken text.     

Where Next in Computer Aided Learning?

The paper is concerned with the use of the computer as a medium for teaching, a tool for learning and a manager of learning. Its special characteristic is seen to be its ability to take a non-trivial role in an interactive situation. The dramatic reduction in the cost of computer hardware is put forward as the major reason for the increasing importance of computer aided learning. The use of computers in support of both unstructured and structured learning situations is discussed. It is argued that the design methods used for the development of computer aided learning facilities need to be adaptive. It is further argued that appropriate hardware and software development tools need to be provided in order to enable adaptive design methods to be used. The particular importance of paying attention to the man-computer interface in designing computer aided learning systems is discussed. The need to be able to modify the interface after the system has been used by students is emphasized.     

When each one has one: The influences on teaching strategies and student achievement of using laptops in the classroom

In this study, we examined the educational effects of providing fifth-, sixth-, and seventh-grade students with 24-hour access to laptop computers. Specifically we examined the impact of laptops on classroom activities, and on student use of technology and their writing and problem-solving skills. Participating teachers received computer integration training using the iNtegrating Technology for inQuiry (NTeQ) model to develop problem-based lessons that engage students in critically examining authentic issues, and strengthen research and writing skills. A matched treatment-control group design was employed, in which classes taught at the same grade levels in five participating schools served as the laptop (1 computer per student) and control (5+ computers per class) contexts. Participants included students, teachers, and parents from the two groups. Although systematic observations revealed relatively few differences in teaching methods between laptop and control classrooms, laptop students used computers more frequently, extensively, and independently. Writing assessment results showed substantial and significant advantages for laptop over control students, with six of eight effect sizes exceeding +0.80. Results also showed significant advantages for the laptop group on five of the seven components of the problem-solving task.     

The Support Model for interactive assessment

The two most common models for assessment involve measuring how well students perform on a task (the quality model), and how difficult a task students can succeed on (the difficulty model). By exploiting the interactive potential of computers we may be able to use a third model: measuring how much help a student needs to complete a task. We assume that every student can complete it, but some need more support than others. This kind of tailored support will give students a positive experience of assessment, and a learning experience, while allowing us to differentiate them by ability. The computer can offer several kinds of support, such as help with understanding a question, hints on the meanings of key concepts, and examples or analogies. A further type of support has particular importance for test validity: the computer can probe students for a deeper explanation than they have so far given. In subjects like geography or science, markers often would like to ask ‘yes, but why?’, suspecting that students understand more than they have written. We describe a series of studies in which students were given a high level task as an oral interview and then as an interactive computerised assessment with varying types of support. Implications of the support model for future modes of assessment are discussed.     

The acquisition of literacy skills in 1:1 classrooms – the Danish case

In Denmark, 1:1 classroom has been implemented in all public schools (grades 1–9). Each student regularly accesses, processes, produces and exchanges written material using a computer (PC, laptop, tablet, etc.). These devices are considered as tools to enhance educational objectives, and in the article I present findings from research about how these devices might be used to enhance the students’ acquisition of literacy skills. An internationally comparative analysis by the OECD of the digital skills that students have acquired shows no appreciable improvements in student achievement in reading in the countries that ‘had invested heavily in educational technology’. The Danish cases presented in this paper, however, identify ways of using digital technology in order to improve student digital literacy skills. They provide evidence suggesting a positive influence on student reading, creating and sharing of learning material in 1:1 classrooms. The results gained are considered critical in the sense that they can be generalized with a view to future development of 1:1 educational initiatives.     

An interactive learning environment (ILE) to study statistics: Effects of prior knowledge on the use of embedded support devices

The present contribution focuses on an interactive learning environment for the delivery of distance education learning materials. The use of such an interactive learning environment is foreseen in a distance education context in which students explore and study (part) of the learning materials by means of a personal computer. Research with interactive learning environments is transposed to the development of a course delivery environment, called ILCE, that also supports the development of a course model and learning materials. A learning environment as used in the present study allows students to access the course materials in a more flexible way. The printed self-study materials often do not correspond with the specific needs of a student, are only weakly related to his or her prior knowledge, or do not take account of differences in learning style. Although the printed course materials include text-embedded support devices (e.g., examples, exercises, illustrations), it is questioned whether the available devices provide enough support for each individual student. Therefore, it is argued that an interactive learning environment — in which a student is actively engaged in selecting learning materials (basic content and embedded support devices) — may provide a valuable tool in order to meet the individual needs of the student. Prototypes of an interactive learning environment were tested in two experimental settings. It appeared that all students were actively engaged in selecting the required support devices. However, the results showed that students with a high prior knowledge state manifested a higher amount of interactive use of support devices than their peers with a low prior knowledge state. The latter was especially found for support devices that either reinforce the acquisition process or provide a tool to test one’s mastery level.     

Student‐teachers’ Use of Computers during Teaching Practice in Primary Classrooms

It is argued that teacher readiness is crucial to the realisation of national goals for educational computer use and that the preparation of student teachers can make an important contribution. This study investigated student‐teachers’ dispositions towards computers and their use of computers in primary‐school classrooms during a final‐year practicum. The student teachers generally viewed computers positively but lacked confidence in their knowledge of computers. While they were nervous about using computers in classrooms, almost two‐thirds did use a computer at least once during a four‐week practicum and were more likely to do so if the supervising teacher modelled such use. The most frequently experienced problems in using computers were organisational. Based on the findings of this study it is suggested that preservice courses should focus on the pedagogical issues associated with computer use and they should provide students with opportunities to observe and practise classroom computing.     

A rationale and description of a CAI program to teach the BASIC programming language

A BASIC Instructional Program is being developed as a vehicle for research in tutorial modes of computer-assisted instruction (CAI). Several design features will be appropriate to training in other technical areas and applicable in other instructional settings where the development of analytic and problem-solving skills is a goal. Methods are incorporated for monitoring and aiding the student as he works on programming problems in the BASIC language. The instructional program developed can be used to investigate schemes for optimizing problem presentation and giving assistance during problem-solving based on a model of the student's abilities and difficulties. Previous experience in the instructional and technical aspects of teaching a programming language indicates that a course in computer programming can be designed to help the student acquire programming concepts in a personalized and efficient manner as he develops skills at increasingly advanced levels. This article reports on work currently in progress and briefly summarizes observations and conclusions based on operation during the pilot year. A major goal of the research project is to increase the sophistication with which the instructional program monitors the student's work and responds to it with appropriate hints and prompts. One aspect of such work is the utilization of algorithms for checking the correctness of a student procedure. Limited but sufficient program verification is possible through simulated execution of the program on test data stored with each problem. Within the controllable context of instruction, where the problems to be solved are predetermined and their solutions known, simulated execution of the student's program can effectively determine its closeness to a stored model solution. The BASIC Instructional Program (BIP) is written in SAIL (VanLehn, 1973; Swinehart and Sproull, 1971), a versatile, ALGOL-like language, implemented exclusively at present on the DEC PDP-10 computer. SAIL includes a flexible associative sublanguage called LEAP (Feldman et al., 1972), which was used extensively to build BIP's information network. The course is now running on the PDP-10 TENEX timesharing system at the Institute for Mathematical Studies in the Social Sciences. It was offered during the pilot year as an introductory programming course at DeAnza College in Cupertino, California, and at the University of San Francisco in San Francisco, California. The collected data are being used to modify the problems and the “help” sequences in preparation for a more controlled experimental situation planned for the next academic year.     

Evolution of a Low Cost Control Engineering Laboratory

A novel approach is presented in this paper for building an inexpensive control engineering laboratory in support of control courses in an undergraduate engineering program. The use of simple IC–operational amplifier circuits and small personal computers in performing the control experiments is outlined. An optimum configuration of the laboratory is proposed for minimum servicing requirements and sufficient accuracy to provide realistic results.     

Teaching Visual Design Principles for Computer Science Students

Computing has become highly visual as interactive programs become increasingly prevalent. Computer science students need to be able to create effective visual displays as part of interface implementation. This paper describes a course covering graphic design topics relevant to computer science students. In this course, students learn the basic visual elements, the visual organizational principles and how to use them in the context of the digital page. The other topics of this paper are the presentation of course information to the computer science student, the implementation of the course information as praxis, course project construction, and a method for critiquing student projects. Curriculum Integration will also be discussed as a feature towards achieving a seamless and collaborative experience.     

A head in virtual reality: Development of a dynamic head and neck model

Advances in computer and interface technologies have made it possible to create three‐dimensional (3D) computerized models of anatomical structures for visualization, manipulation, and interaction in a virtual 3D environment. In the past few decades, a multitude of digital models have been developed to facilitate complex spatial learning of the human body. However, there is limited empirical evidence to guide the development and integration of effective computer models for teaching and learning. The purpose of this article is to describe the development of a dynamic head and neck model with flexible displays (2D, 3D, and stereoscopic 3D) and interactive control features that can be later used to design and test the efficacy of computer models as a means of improving student learning. The model was created using computer tomography scans of a human cadaver. Anatomical structures captured on the scans were segmented into discreet areas, and then reconstructed in three‐dimensions using specialized software. The final model consists of 70 distinct anatomical structures that can be displayed in 2D, 3D, or stereoscopic 3D. In 3D mode, a mouse can be used to actively and continuously interact with the model by manipulating viewer orientation, altering surface transparency, superimposing 2D scans with 3D reconstructions, removing or adding structures sequentially, and customizing animated scenes to show complex anatomical pathways or relationships. Anat Sci Educ 2: 294–301, 2009. © 2009 American Association of Anatomists.     

Computer-aided Learning and Teaching of Information Skills for Engineering Students

The paper discusses the use of computers in the teaching of engineering students. A distinction is made between using computers for word-processing, etc., and using computer-based educational packages. While engineering education has been slow to take up computer-aided learning, a gradually increasing awareness of computer capabilities suggests a possible increase in computer-aided learning/teaching in future.     

Notes on Classroom Practice and the Ownership and Use of Personal Computers Amongst Egyptian Science and Mathematics Teachers

This paper reports a study of the acquisition and use of personal computers by Egyptian science and mathematics teachers. Self-report data was collected from the same teachers on how they had changed their classroom activities and professional practice since their return to Egypt following a twelve-week in-service course in the United Kingdom. The data from this sample of teachers is compared with that from a second sample, who also attended the same in-service programme, but did not report the purchase of a personal computer. Analysis indicates that the Egyptian teachers with personal computers have tended to concentrate on improving the quality of current practice, through better preparation and student testing, rather than introducing major, paradigmatic, changes to their teaching.     

Discrete-time systems

In this article we introduce digital control and contrast it with analog control. Traditionally, control systems have been designed using analog techniques. But today, because of the explosive growth of digital technology, controllers are typically implemented as programmable digital hardware or as programs on digital computers. The concepts and techniques for analysis and design of digital controllers are the central concerns of this article. In this part we introduce discrete-time signals and provide examples. We also describe discrete-time systems in terms of difference equations and look at their solutions via transform methods.