Intelligent tutoring system (ITS) is a contribution from Artificial Intelligence domain. It is an expert system that has a very effective role in modern education. It facilitates both teachers and students in teaching or learning of some concept of a domain. Despite of large number of benefits from ITS, yet very few people have experienced it in real environment. It is primarily due to high complexity of ITS development requirements. Modeling the correct and consistent domain knowledge that supports both pedagogical and software development activities and ITS user friendly interface creates this complexity. An ITS is proposed for pre-school curriculum that models the domain using Resource Description Framework Schema (RDFS). In present work formal details of domain or knowledge modeling are provided and demonstrated the application of proposed modeling with the prototype results. Proposed domain modeling approach provides ease to both development activities and user friendly interface; also it models a complete and consistent domain. © 2012 IEEE.