DMITRI IVANOVICH MENDELEEV (1834 – 1907)

KNOWLEDGE OF AND ATTITUDES TOWARDS WATER IN 5\(^{TH}\), 6\(^{TH}\) AND 7\(^{TH}\) GRADE STUDENTS

Pupils of grades 5, 6 and 7 are asked about their knowledge and attitudes concerning water as a basic factor of nature and environment. A variety of posters and multimedia presentations (147 in total), designed by students and devoted to “Water Day – 22 Marc...

MATHEMATICS FOR TEACHERS AND STUDENTS: CALCULUS

Only four basic principles are necessary to construct the apparatus of calculus: the intuitive concept of speed in a mechanical sense, the mathematical notion of continuous functions and two remarkable mathematical limits. In this way the sets of differentia...

EFFECTS OF THREE COOPERATIVE LEARNING STRATEGIES ON THE PERFORMANCE OF SECONDARY SCHOOL STUDENTS IN PHYSICS

This study investigated the effects of three co-operative learning strategies on the performance of secondary students in physics. It also examined whether the performance of the students would vary with gender and achievement levels. Purposive sampling techni...

STUDENTS’ METACOGNITIVE SELFREGULATION – A CASE STUDY: MOLECULAR STRUCTURE PROBLEM SOLVING

The purpose of this study was to determine the students’ metacognitive self-regulation in problem solving of molecular structure based on the rank of students in the upper, middle, and lower groups. This research type was exploratory by using qualitative ap...

TUNING THE ELECTRONIC PROPERTIES OF HETEROGENEOUS CATALYSTS: AN AUTHENTIC RESEARCH-BASED LABORATORY COURSE

The surface properties of a material play a key role in heterogeneous catalysis. The presented experiment demonstrates tuning of the electronic properties of the catalyst by surface doping with alkali. In spite of the addition of minimal amounts of the select...

VASSIL HRISTOV BOZAROV

Vassil Bozarov’s life and contributions as a scientist and educator are briefly discussed. He worked in the field of biology education, teachers’ training, professional orientation and vocational education. As a longtime editor of the journal “Biology and c...

NEED TO LINK THE TWO CRUCIAL CONTEMPORARY STRATEGIES – SUSTAINABLE DEVELOPMENT AND INNOVATIVE ECONOMY

The economic development has been so far dependent on the utilization of natural resources – of areas and materials – which proceeds with much higher rates than the ecosystems could restore their inherent potential. The paper deals with the “ecosystem service...

AVAILABILITY AND TEACHERS’AWARENESS OF THE EXISTENCE OF SOFTWARE PACKAGES FOR DEVELOPING PHYSICS INSTRUCTION FOR SECONDARY SCHOOL STUDENTS IN MINNA, NIGERIA

Students’ performance in Secondary School Physics Examinations has been unsatisfactory in Minna, Nigeria. Some of the reasons adduced to such poor performance are teachers’ lack of awareness and incompetence in the utilization of appropriate instructional med...

LIVING NATURE

The encyclopedia “Living Nature – Mammals” gives correct information about the mammals – their taxonomy, origin, distribution, newly discovered animals, rare animals. The text is accompanied by over 200 color illustrations, prepared by the artist G. Pche...

RECENT PAPERS ON MISCONCEPTIONS IN TEACHING AND LEARNING OF SCIENCE

A list of selected papers on the misconceptions in science teaching and learning is presented. The papers are published in 2012 and 2013. It is expected this thematic bibliography to help the reader to realize the need of minimization of the false informatio...

С РАКЕТНА ГРАНАТА КЪМ МЕСЕЦА: БОРБА С ЕДНА ЛЕДЕНА ЕПОХА В ГОДИНАТА 3000 СЛЕД ХРИСТА. 2.\(^{1}\)