Abstract: The subject of research is the process of creating a computer simulation simulating the conducting a clinical laboratory analysis of biological fluids using a biochemical analyzer Stat Fax® 1904+. Particular attention is driven to the components of the training simulator and to the algorithm for work with it. The article presents features of developing the virtual instrument, caused by its teaching assignment, which consist of the different training levels of users of the system and the possibility of incorrect input data. The author proposes to create three types of users and design features of the software to ensure the accuracy of the data and compliance with the algorithm of the virtual appliance. The paper shows stages of making a computer simulator, such as modeling the system, translation of the model and analyzing the results of the development. The author describes concentrations of a substance in a sample simulated by the software and gives the corresponding formulas for calculations. The study presents a flowchart showing the process of operation of the computer program. The geometric design of application forms and functions of the system is based on this flowchart. A computer simulator created can be used in education at the stage of forming practical skills of students as well as raising the level of professionalism of clinical laboratories. The results of the study can be used in creating training simulators not only for biochemical analysis, but also for other areas of professional activities requiring the use of skills in working with high-tech equipment.

Abstract: The article is devoted to special features of the American national education at the beginning of the XIXth century that created the unique socio-cultural environment for further development of education as one of the triggers of successful social development and led to the modification of Johann Pestalozzi's system of education by his student Joseph Neef. The most important part of Joseph Neef's teaching heritage is his methodological development of training and education issues. Republicanism principles were one of the most important dominants in his theory and practice of teaching as well. 
In her research the author of the article has used the systems approach and the method of scientific analysis which allowed to describe Joseph Neef's theory of teaching as the realization of Johann Pestalozzi's ideas as well as the republicanism and democracy principles. The author of the article concludes that conceptual provisions of the theory of nature-aligned education allowed Joseph Neef to adapt the theory to the Amerian socio-cultural environment. As a result, Johann Pestalozzi's heritage was enriched with the innovative version of Pestalozzianism which, in its turn, created favorable conditions for the development of American economy. 

Abstract: The article is devoted to Joseph Neef’s educational activities who sequentially implemented J.G. Pestalozzi’s ideas in the socio-cultural reality of the New World in early XIX-th century, seeking to do them basic principles of forming system of USA public education. The author examines the contribution to natural education development by the American educator and makes a comparative analysis of pedagogical conceptions of Pestalozzi and J. Neef.