R is free, open-source, cooperatively developed software that implements the S statistical programming language and computing environment. The current capabilities of R are extensive, and it is in wide use, especially among statisticians. The sem package provides basic structural equation modeling facilities in R, including the ability to fit…

The concept of a hierarchy of evidence is useful in rapid electronic searching to answer questions arising during the natural course of clinical practice. The answerable question often begins "What is the evidence that ..." and, when focused on a treatment, usually includes a population, an intervention, a comparison group, and an outcome, often…

This study investigated whether the software Virtus WalkThrough Pro could be used to enhance middle school children's spatial ability as measured by the Paper Folding, Mental Rotations, and Eliot-Price Tests. The study also investigated whether the use of this software impacted males differently than females, or users with high spatial ability…

This article describes the conception, implementation, and current status of Rakim open source software at Midlands Technical college in Columbia, SC. Midlands Technical College (MTC) is a 2-year school in Columbia, S.C. It has two large campuses and three smaller campuses. Although the library functions as a single unit, there are separate…

The purpose of this study was to investigate the 'locality' of the relationship between attitudes towards science, self-beliefs and science achievement for senior high school students in Australia, Cyprus and the USA. These relationships were examined with the use of the structural equation modeling software, AMOS. The data for this study were…

In this paper it is presented a virtual organizational environment, conceived with the integration of three computer programs: a manufacturing simulation package, an automation of businesses processes (workflows), and business intelligence (Balanced Scorecard) software. It was created as a supporting tool for teaching IE, its purpose is to give…

Privacy is a requirement that has not received the required attention in most e-learning platforms. Based on the results of a survey we identified weaknesses of e-learning platforms and describe improvements we made in Moodle as a proof-of-concept.

Computing limits of functions is a traditional part of mathematical analysis which is very difficult for students. Now an algorithm for the elimination of quantifiers in the field of real numbers is implemented in the program Mathematica. This offers a non-traditional view on this classical theme. (Contains 1 table.)

This paper reports on a design experiment in the domain of number sequences conducted in the course of the "WebLabs" project. We iteratively designed and tested a set of activities and tools in which 10-14 year old students used the "ToonTalk" programming environment to construct models of sequences and series, and then shared…

In this paper we consider geometrical construction problems and their role in mathematical education. Owing to the main features of construction problems (accuracy in making conclusions, strict structure, rigorous language and constructivistic nature), they can be fruitfully used in teaching mathematics and computer science. We shall try to shed…

This article describes possibilities for technology use among students with mild disabilities. It considers characteristics of assistive technology from the standpoint of strategies associated with universal design for learning and Type I and Type II software applications. After a brief description of assistive technology definitions, legislation,…

Background: Computer software is widely used to support literacy learning. There are few randomised trials to support its effectiveness. Therefore, there is an urgent need to rigorously evaluate computer software that supports literacy learning. Methods: We undertook a pragmatic randomised controlled trial among pupils aged 11-12 within a single…

This paper concerns the use of Information and Communications Technology (ICT) in music classrooms, with the focus on the secondary school music curriculum in the United Kingdom. In particular, it reports on a study of learners in a UK school using software designed to support practical music skills. The paper begins by briefly raising and…

Finite mixture models are well known to have poorly behaved likelihood functions featuring singularities and multiple optima. Growth mixture models may suffer from fewer of these problems, potentially benefiting from the structure imposed on the estimated class means and covariances by the specified growth model. As demonstrated here, however,…

In the last years, Instructional Design has seen the development of visual notation systems for supporting and enhancing the design process. Some of them concern the definition of learning goals, while others address the definition of learning activities or learning materials. These tools supposedly reduce the cognitive load and enhance design…