The study investigates secondary students' understanding of "orbital" and "electron cloud" concepts in different quantum contexts (for values of the ?principal quantum number n = 1 and n = 2) on the basis of their verbal and pictorial representations, evaluating also their consistency. Participants, which were 192 12th-grade…

The introduction of the computer into the educational process is a fact. The educational use of new technologies creates a new, more appealing and enjoyable learning environment. The introduction of new technologies into school differentiates the role of the professor by giving him/her a guiding character in a process of experiential approach to…

Teachers' knowledge rooted in classroom practices guides their actions when dealing with a specific subject matter. To assess the quality of these practices, a close examination of the "classroom reality" is needed. The present study, which was carried out in Greece, investigates secondary science teachers' practices. To record these…

This paper addresses the interesting issue of mobile-assisted language learning using novel techniques for further improving the adaptivity and personalisation to students. The domain model of the system includes English and French language concepts, and its user model holds information about students and their progress. It also embodies a…

The role of teachers is very important for the educational utilization of Computational Thinking (CT) and its integration in education. As with any innovation, CTs' successful integration considerably depends on the perceptions, beliefs and attitudes of the teachers who will be asked to implement it. The study of these characteristics, concerning…

This study is focused on the development, implementation and evaluation of an environmental education programme for secondary education students. The programme was entitled "?he effects of fire on the soil system" and it was implemented during the school period of 2008. Twenty-four (24) students (aged from 15 to 20) coming from Lidoriki…

In this paper a two-stage research study is described focused on problem solving relevant to place-value and on the use of the operations within the calculator environment. The findings show that in this specific environment and via appropriate tasks teachers are provided with a context to better understand what year 5 or 6 pupils know or do not…

This essay explores the ways in which the ancient Greek concept of parrhesia, defined as "frank speech and telling the truth as one sees it," can help facilitate the development of both intellectual courage and democracy as a way of life. It theorizes dimensions of parrhesia for the purpose of better educating a civic self-image rooted…

Describes a survey of Greek schoolchildren's alternative conceptions about weather and climate. Finds that misconceptions exist, including confusion between the meanings of the terms "weather" and "climate", inflated estimates of temperature, and a belief that yearly weather data define climate. Suggests ways to help students…

Discusses some difficulties in teaching the concept of voltage to secondary school students. Presents and describes the content of a teaching sequence introducing voltage as a primary concept through relationships with other variables. Provides an example of the delivery of the teaching model. (YP)