This paper uses document analysis to investigate the concepts and meanings of curriculum integration. Three models, namely disciplinary, trans-disciplinary, and inter-disciplinary curriculum models are generated and discussed. Related practices developed by in-service art teachers are used to explain these models. Furthermore, this study suggests a thematic model portraying characteristics of curriculum integration that can be useful for guiding classroom practices in art education. Regarding the consistency of curriculum development, some suggestions of selecting teaching materials are also made for future implementation.