The paper discusses the development of Web educational services for specific groups. A key feature is to allow the display and use of educational materials and training services to the widest possible set of different devices, especially in the browser classic desktop computers, notebooks, tablets, mobile phones and also on different readers for visually impaired users. The Web service will be created according to the rules WCAG (Web Content Accessibility Guidelines). The article also focuses on the accessibility of educational services and the selection of appropriate tools for effortless and effective implementation. The Department of Information Technologies of the Czech University of Life Sciences Prague has extensive experience with electronic online education of specific groups (e.g . seniors, women at maternity leave). The solution will be used in the development of educational services "Labyrinth". Software will be developed in collaboration the Department of Information Technologies of the Czech University of Life Sciences Prague and nongovernment organization Czech Society for Information Technology in Agriculture. [For the complete proceedings, see ED562096.]