The present study aims to explore the effectiveness of a proposed study unit based on the funds of knowledge theory in developing the attitudes towards cultural identity and the proposed study unit. In order to achieve the goal of the study, the two researchers followed the quasi-experimental approach, where the study sample consisted of (28) female students of the fifth-grade at Al-Jeelah Basic Education School, Al-Dakhiliyah Governorate in the Sultanate of Oman. The data were collected by two scales: the first is a scale of attitudes towards cultural identity consisting of (26) items. The second was a scale of attitudes towards the proposed study unit, which consisted of (24) items. The results of the study revealed that the effect of the proposed unit in improving the attitudes of fifth grade students towards cultural identity and to the proposed study unit. It came in favor of the post-application; where the medium of the cultural identity scale reached (3.81), and with a medium average (4.74) for the scale of attitude towards proposed unite. In light of this, the two researchers recommended the importance of employing the theory of funds of knowledge in building social studies curricula and benefiting from the experiences of families and their culture in strengthening the attitudes towards cultural identity and preserving it from loss and extinction.