Numerous processes, including the formation of planet Earth, are beginning to take place at the occurrence of the Universe. By creating conditions for life on Earth, the living world, plants, animals and humans are gradually evolving. Sunlight and heat, water, air and soil are abiotic factors essential for life on Earth. Each of these life conditions is important in its own way, complementing each other and allowing other processes that are important to all living organisms. According to the Curriculum (2006), the specified living conditions are foreseen for teaching in the fourth grade of elementary school. A study involving 66 pupils of the fourth grade from the five elementary schools of the island of Brač was conducted from February to April 2017. The aim of this research was to determine which of the teaching methods, methods of conversation or the practice of practical work, enables full cognition of the content Air - condition of life. Also we have examined the interest of students in performing practical work in teaching. As a research instrument, the Instructional leaflet was used with a series of objective-type assignments that twice tested the pupil's knowledge of the air, one after the teaching during which the method of conversation was applied and the second time after using the practical work method. A short Questionnary was used to examine the frequency and manner of conducting practical work in teaching. Analysis of the results of the Instructional leaflet 1 and 2 showed that fourth-grade pupils are better acquainted with teaching content on the subject of air, actively participating in performing practical work. By self-conducting practical work, pupils observe the phenomena and processes of everyday life and thus prepare themselves for life and work in the community in which they live. By analyzing the results of the Questionnaire on the interest of students of the fourth grade for the learning of the content of the subject in the air using practical methods, it turned out that the students are more motivated and interested in learning when they come to conclusions and make their own opinions independently. The practice of practical work, if implemented in the right way in contemporary teaching aimed at students, enables the creation of knowledge, skills and habits that get the right value when they can be applied in the real environment of an individual. By properly applying the methods of practical work in teaching, but also by combining with other methods, the teacher certainly raises the quality of the teaching process to a higher level. Networking of different teaching methods and strategies contributes to the dynamics of the teaching process as well to the pupils knowledge comprehension.