HOW TO MEASURE THE SCHOOL OUTCOME (ON THE EXAMPLE OF A SPECIFIC EDUCATIONAL GOAL)

PERCEPTIONS OF THE WORLD: THE ROLE OF SCIENTIFIC EXPLANATION IN SCIENCE EDUCATION FOR FORMING THE WORLDVIEW OF STUDENTS

Everyone has his/her own view of the surrounding world. The school has a significant role in shaping these views. Therefore, targeted actions are needed in the classroom to build an adequate scientific insight and understanding of the relations: human – nat...

CONCEPTUAL SCHEME OF THE SCHOOL COURSE IN CHEMISTRY: MACROSCOPIC APPROACH

A possible scheme of hierarchical introducing the basic concepts and terms in the school course in chemistry is advocated. Following the former Bulgarian educational tradition, it is done within the macroscopic methodological approach and the introduction of...

ROLE OF ULTRASONIC WAVES TO STUDY MOLECULAR INTERACTIONS IN AQUEOUS SOLUTION OF DICLOFENAC SODIUM

Ultrasonic is a powerful nondestructive technique having wide range of applications in the field of material science. When ultrasonic wave passes through the medium these waves can actively interact with medium and activate the different processes in the medi...

SIMULTANEOUS ESTIMATION OF IBUPROFEN AND RANITIDINE HYDROCHLORIDE USING UV SPECTROPHOTOMETRIC METHOD

A new method has been developed for the simultaneous estimation of ibuprofen and ranitidine HCl using UV spectroscopy. The calibration graphs were linear in the ranges of \(2-12 \mu \mathrm{~g} / \mathrm{ml}\) for ibuprofen (\(\mathrm{r}^{2}=0.9994\) ) and \(5...

COMPUTER-AIDED EDUCATIONAL TECHNOLOGIES IN THE LABORATORY EXERCISES IN PHYSICS

The paper gives a proper example for using the computer-aided educational technologies in teaching practice in school. It is described how to realize a physics laboratory exercise named „determination of gravity acceleration with mathematical pendulum“.

A NEW FORMAL GEOMETRICAL METHOD FOR BALANCING CONTINUUM CLASSES OF CHEMICAL REACTIONS

In this article a new formal geometrical method is developed for balancing continuum class chemical reactions. Here are treated new continuum classes of aliphatic hydrocarbon chemical reactions which possess atoms with integer oxidation numbers. All considere...

DEPENDENCE BETWEEN STRUCTURE AND PROPERTIES OF COMPOUNDS OF P-ELEMENTS

In this paper, some examples of tetrahedral and octahedral structures are given as one of the kinetic factors that affect the stability of compounds of p-elements. The tetrahedral structure is typical for second period elements whose atoms have four valence o...

GAPS AND OPPORTUNITIES IN THE USE OF REMOTE SENSING FOR SOIL EROSION ASSESSMENT

Remote sensing data provide spatial information of the Earth surface and are used, amongst various applications, for obtaining information on soil erosion parameters, such as vegetation cover, topography and soil moisture. The use of high spectral resolutio...

RADIOCHEMISTRY AND ARCHEOMETRY: PROF. IVELIN KULEFF, DSc

INTERACTIVE METHODS IN „CHEMISTRY AND ENVIRONMENT“SCHOOL SUBJECT

The active and interactive instruction in Chemistry and Environment Protection School Subject is a useful educational resource for chemistry teachers. Authors present the main features of active and interactive methodology in science education. They have cho...

A MODERN MANUAL FOR ACTIVE LEARNING IN SCIENCE

The active learning in science is a textbook written as part of the international project “Student Active Learning in Science” (SALiS). Academics and educators at ten partner institutions from six countries: Georgia, Bulgaria, Germany, Ireland, Israel and...