Different conceptions on reality in physics and philosophy in the 20th century have been analyzed in the article. These approaches caused the necessity to study the multitude of the worlds. The author proved that multiworld interpretation of quantum mechanics and multitude of the worlds in the Goodman'€™s conception are opposite tendencies. Everett and his followers consider the quantum world as some universal reality whereas Goodman and his supporters do not believe in universal reality.

Ideas used in the philosophy of science to describe the development of science (T. Kuhn, V. Stepin, K. Hübner) are analyzed in a context of their adaptation for educational purposes. It is shown that the most appropriate approach considers the science as a unique complex self-organizing system. This approach makes it possible to integrate any fruitful ideas from different models.