Abstract
A systematic approach requires combining the knowledge of related subjects (e.g., natural sciences) into a whole and making conditions for the learners to research, draw conclusions, process abundant and diverse information, improve and change, complete their knowledge, i.e., eliminate common/traditional subject barriers, refuse narrow empiricism. The field of science education is wide, complex and diverse. It is not only the transmission of natural science knowledge but also ecological, environmental, antidrug, sexual, antinicotine education, healthy lifestyle training, etc. Today’s society is dealing with very relevant issues of nature protection, nature conservation, ecology, environmental protection, and other problems. All this requires a new approach from all of us, the efforts of various field specialists, eliminating all separating barriers. Global problems are a common concern for all of us. This is just because not a single problem is isolated from another, most of them are intertwined, fully determined, united in their nature. Therefore, knowing (clarifying) connections is complicated and hardly achievable. Their solution is possible only when they are comprehensively analysed by closely linking them together.
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