Aronia melanocarpa (Michx.) Elliott, also called black-fruited aronia and chokeberry, is a plant that belongs to the rose family (Rosacea), and finds its habitat on acidic and moist soil. In nature, we find it in the form of a bush, and it is recognizable by its purple-red fruits that appear in large numbers. Depending on the medium pH, chokeberry fruit changes colour of the medium from red, pink to purple, yellow and green, which is why it can be used as an alternative acid-base indicator. Therefore, in this study fresh chokeberry fruit was used in order to prepare acid-base initiators with selected solvents. The aim of this work was to determine the durability of indicators prepared in this way and the importance of the solvent with which the indicator is prepared. Thesis also includes study of the possibility of recycling plant material in the preparation of new (recycled) indicators. The results of the research show the exceptional durability of indicators prepared in this way and of the used plant material. Such indicators could be widely used due to their low cost, long shelf life, easy preparation and possibility of storage. Due to all the above-mentioned characteristics, fresh chokeberry is very applicable in chemistry classroom since it visually brings the teaching material about indicators closer to students and contributes to better comprehension and understanding of these lessons. The application of fresh chokeberry as an acid-base indicator would meet the need of the "School for Life" curricular reform, as the students would be able to connect the learned material with everyday life and its application.