The text describes the registration process for the 5th edition of the nationwide mathematical and computer science competition called "InstaLogik." The registration form for students can be found at https://instalogik.pl/?page=register, and it requires them to enter a teacher code (N2870722), provided by the teacher. The competition is open to students in grades 4-8, and their registration and solution submissions will be managed by the website. There is also a webinar available for participants and their parents and teachers, titled "Domino, Bitwa kulek" (Domino, Ball Battle).