Textbook in PDF format Foreword. G. Képes, Á. Erdősné németh. As the Epitome of Talent: John von Neumann and Hungarian-born Scientists Around Him. G. Audrito, M. Ciobanu, L. Laura. Giochi di Fibonacci: Competitive Programming for Young Students. B. Gaál. The Introduction of Micro:bit in Elementary School, from Unplugged Activity to Programs. B. Gaál. Online Robotics Activities During the Pandemic Period — Challenges and Experiences. L.G. Menyhárt, L. Zsakó. Elementary Algorithms — Prefix Sum. V. Natali, natalia, C.E. Nugraheni. Indonesian Bebras Challenge 2021 Exploratory Data Analysis. P.S. Pankov, A.A. Belyaev. Latent and Evident Knowledge to Compose and to Solve Tasks in Informatics. T. Verhoeff. Understanding and Designing Recursive Functions via Syntactic Rewriting. M. Visnovitz, G. Horváth. Trends in Teaching Programming in Schools in Hungary. Reports