Many phenomena in life occur periodically. In 2019 the whole humanity celebrates the International Year of the Periodic Table, declared by UNESCO. Our project is dedicated to the 150th anniversary of the discovery of the Periodicity Law - the fundamental law of the nature. The project consists in the international collaboration of students for identifying and investigating the periodic phenomena in our life, in nature, society, science, chemistry, music, which have an important role for developing students’ scientific competences.