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Courses on Operating Systems (OS) are essential in computer science education. The topic provides the students with an excellent opportunity to experience the interplay between theory and practice. Specifically, a project-based-learning (PBL) instructional design for an OS course can provide the students with opportunities to engage in practical projects. The PBL approach enables students to take part in learning activities which are essential for grasping underlying theoretical concepts, linking theory, practice and system-level perception. In this paper we present our experience in teaching an operating systems course with a continuing evolving project using a PBL approach. The findings of a preliminary assessment indicated a highly positive attitude on the part of the students towards the PBL approach used in the course as well as towards the qualitative evaluation method that was used to assess their achievements. [ABSTRACT FROM AUTHOR]

Students often find that learning to program is hard. Introductory programming courses have high drop-out rates and students do not learn to program well. This paper presents experiences from three educational institutions where introductory programming courses were improved by adopting Python as the first programming language and roles of variables as an aid in understanding program behavior. As a result of these changes, students were able to write working code from the very beginning, they found programming easy and interesting, they passed exams with good grades, and drop-out rates were low. Students became interested in programming and some of them even changed their personal study plan to include more of programming and computer science. The high abstraction level and complexity of the concepts to be learned in current elementary programming courses is a serious impediment to students. Python is a simple but powerful programming language that supports both procedural and object-oriented programming. It makes short programs straightforward to write while at the same time facilitating rapid development of powerful applications. Python has been found to make programming more fun and thus attract students. Some of the common arguments against Python include concerns about using an interpreted language, the different syntax from C++ and Java, the use of whitespace to represent code blocks, and the lack of static type checking. However, these concerns have not caused any significant problems in practice, though it may take some effort to adapt to the syntax of other languages. Roles of variables are stereotyped patterns of usage of a variable. For example, in the role of a stepper, a variable is assigned a succession of values that is predictable and usually known in advance as soon as the succession starts. Roles provide students with programming knowledge in a compact form, which they can then apply in authoring and understanding programs independently of the programming language used. In a classroom experiment, explicit teaching of roles has been found to result in better programming skills. This paper also discusses the applicability of the roles to Python and notes some changes in the interpretation of individual roles required by some peculiarities of Python. In general, roles apply to Python well. However, the lack of constants in Python calls for a new role, and the use of lists in for-loops suggests a new interpretation for the stepper role. Finally, the difference between the two data structure roles, organizer and container, is smaller in Python than in other languages making their separation needless. [ABSTRACT FROM PUBLISHER]

Roles of variables, which describe stereotypic usages of variables, can be exploited to facilitate teaching introductory programming. This paper describes the evaluation of visual metaphors for roles used in a role-based program animator. The evaluation is based on several criteria: properties of the images, metaphor recognition and grading, and effects on learning. The study demonstrates that as a whole the role metaphors facilitate learning. The results also identify ideas for further elaboration of the individual metaphors. Furthermore, the study suggests that the evaluation of animated metaphors may require special measures. [ABSTRACT FROM AUTHOR]

The rapid evolvement of the computing domain has posed challenges in attempting to bridge the gap between school and the contemporary world of computing, which is related to content, learning culture, and professional norms. We believe that the interaction of high-school students who major in computer science or software engineering with leading representatives of the computing community of practice may motivate them to pursue their studies further or pursue a career in the field. Accordingly, our program aims at exposing talented high-school students "directly by leading experts" to state-of-the-art computing research, advanced technologies, software engineering methodologies, and professional norms. The interaction between the students and the experts, who actually become role models for the students, occurs at two levels: (a) during enrichment plenary meetings, and (b) through one-to-one interaction in which students develop software projects under the apprenticeship-based supervision of professionals from the computing community of practice. In the last four years, six hundred students participated in enrichment activities; 86 of these students accomplished high-level software projects under the supervision of experts. A long-term formative evaluation of the program has been conducted regarding: (1) students' attitudes towards the "different-from-school" style of learning that characterizes the program, and (2) students' performance in developing projects. In this paper, we specifically discuss the contribution of resources that students used for various phases of the project development activity. We found that the following categories of resources were employed by the students: self-learning, mentors, bibliographic resources (the Web, professional articles, professional books), school resources (a school teacher, school learning, and materials), and other human resources (i.e., a classmate the student's age, a family member, a grown-up acquaintance). Importantly, the findings indicated that during the entire development process the students exhibited self-efficacy, since they relied more on themselves than on other resources. Interestingly, during the entire development process, the web was perceived as the most significant bibliographic resource. Specifically, regarding the need to achieve adequate acquaintance with the theoretical knowledge that was required, self-studying and the web were perceived as the most significant resources, which may imply that the mentors' guidance inspired the students' self-inquiry and self-study. However, during the problem-solving activities, students relied more on the mentors than on bibliographic resources. Based on the study findings, we concluded that professional experts who supervise students in project development may motivate them to acquire in-depth knowledge in computing, promote creativity, as well as enhance self-learning and inquiry ability. In addition, the interaction with role models may contribute to establishing professional norms. We hope that further implementation of the program, along with recruitment of more representative experts from academia and hi-tech industry, will promote a culture of learning and work befitting the dynamic world of industrial computing, thus providing the students with an entry point into the computing community of practice. [ABSTRACT FROM PUBLISHER]

Modern information technology and computer science curricula employ a variety of graphical tools and development environments to facilitate student learning of introductory programming concepts and techniques. While the provision of interactive features and the use of visualization can enhance students' understanding and assist them in grasping fundamental ideas, the real difficulty for many students lies in making the transition from relying on the graphical features of these tools, to actually writing programming code statements in accordance with a set of plain English instructions. This article opens with a systematic review of the literature on alternative approaches to teaching object-oriented programming (OOP) to novice programmers. It then describes the rationale behind an "objects first, class user first" approach to introducing OOP, arguing for the use of interactive GUI-based visualization tools such as BlueJ as cognitive tools to allow learners to represent and manipulate their mental models or schemas. Finally, it reports on a study involving a cohort of students undertaking an introductory OOP unit in Java. The study investigated the effectiveness of: (i) the graphical features of BlueJ as a cognitive tool while performing coding tasks as part of a test; and (ii) the use of screencasts (video screen captures) of BlueJ to provide scaffolding during learning, which involves the provision of temporary support structures to assist learners in attaining the next stage or level in their development. The screencasts were used in conjunction with a series of structured exercises by providing an intermediate stepping stone to ease the transition to the writing of program code. The study found no significant effect of screencasts during the learning phase of the study, and no significant effect of BlueJ during testing. This result runs counter to theoretical predictions and consequently is important both for researchers focusing on the pedagogy associated with learning programming as well as those interested in the broader applications of animated instructional resources and cognitive tools. In the article, the authors postulate a number of reasons for the lack of significant effects to sup-port their hypotheses. Firstly, it is possible that some, or perhaps many, participants who had access to BlueJ during the testing phase did not actually use it to assist them in answering the test questions. Secondly, since the screencasts and BlueJ were intended to ease students' transition to code, the data collection was conducted immediately following the participants' initial exposure to code statements. This gave rise to the possibility that they may not have been ready to attempt the questions framed at a high level of abstraction, which accounted for a majority of the test marks. The authors had hypothesized that the most benefit in providing the screencast-based scaffolding and the use of BlueJ as a cognitive tool was likely to be gained in assisting students with writing code for English instructions at this high level of abstraction; however, at this point in the semester they may not have been adequately prepared to undertake these types of questions, which required them to interpret the high-level task requirements and decompose them into individual object and class operations that would achieve the desired outcome (object state). Further research will need to be carried out to determine whether these hypothesized reasons for the lack of an identifiable difference between conditions can be supported, whether other factors are responsible, or whether in fact neither BlueJ screencasts nor the use of BlueJ as a cognitive tool actually enhance learning. One possible approach to a follow-up study would involve using a smaller number of students, but carrying out intensive observation during the experiment in order to determine the degree to which, and ways in which, BlueJ is used.… [ABSTRACT FROM PUBLISHER]