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The main purpose of the present study is to develop a practical guide to the integrated curriculum of the third grade of elementary school. The research approach was qualitative (qualitative content analysis method) and the research community was all third grade elementary textbooks and teacher teaching guides of each book. The theme-based integrated curriculum approach (concept-based and skill-based) was chosen. Concepts and skills were extracted from the textbooks and the objectives of each lesson were extracted from the teacher's teaching guides and coded at the same time. Codes that had a common theme were placed in one category and formed the combined themes of the curriculum. 192 initial codes were obtained. After classification, 106categories were obtained and finally, 14 combined themes were formed.