The meaning of integration is creation of new characteristics by integration of different elements. The meaning of integration is different from case to case, from simple mixing two different characteristics, to the best, perfect integration. Traditionally integration is integration of different subjects so as to teach effectively and efficiently in contrast to teach each subject independently. Here I would like to conceptualize the integration as the integration of internal world of the learner rather than the external world. The integration of subject is classified as multidisciplinary, interdisciplinary and transdisciplinary approaches. Integration in a single subject is integration of cognitive, psychomotor, and affective domains, integration of unit among some subjects and integration of real life situation. The strong points for integration are to provide quality of education that can have perspectives for the meaning of life, provide accustomed teaching & learning environments. Also it is afformative effect to integrate cognitive, psychomotor and affedtive domain. The shortcomings of integration is the loss of the system of contents for teaching for coresponding subject, time consuming teaching and learning activities in classrooms, limitation of concepts or contents introduced in the classroom for teaching, lack of materials to support the integrated approach and difficulty of developing curriculum and related materials. The strategies for integrations are activity centered learning, respect for the selection of students, respect for the interests and concern of students, approach for the problem centered learning, stress relationship of related subject. Also examplary materials of integrations are provided for deeper understanding of integration.