<![CDATA[Kindergarten/RA is one form of preschool education unit held before elementary education level (Law of the Republic of Indonesia no. 20 of 2003 concerning the National Education System, article 28). Kindergarten/RA education aims to help lay the foundation for further development. Kindergarten/RA is also a formal educational institution before entering Elementary School. One of the things that is developed is the cognitive ability of geometric shapes. Low learning ability of geometric shapes is a problem faced by teachers in Group A RA Al Ikhlash Sukosari Kasembon. Based on these conditions, the formulation of the problem presented in this writing is: what objects are used to develop cognitive abilities of geometric shapes in Group A RA Al Ikhlash Sukosari Kasembon and how to improve cognitive abilities of geometric shapes by using natural media around children in Group A RA RA Al Ikhlash Sukosari Kasembon. This study uses Classroom Action Research (CAR) which is carried out in two cycles, with each cycle including planning, implementation, observation, and reflection. The data source is students of Group A RA Al Ikhlash Sukosari Kasembon, through more interesting learning activities using natural media around with objects that are adjusted to the theme as a learning resource proven to be able to improve children's geometric shape abilities, which can be seen from the observation data sheet during the geometric shape learning activity. In cycle I, the results obtained were 50% increase in geometric shape learning abilities in cycle II, the results obtained were 82.05% with these results indicating that this study was successful because it exceeded the target of the research indicator by 80%. The results of this study indicate that with natural media as a learning resource it can be said to be successful in improving geometric shape abilities. Based on this study, it is recommended that all teachers can provide interesting and enjoyable geometric shape learning for children. Teachers should also be able to create a comfortable and enjoyable learning environment for children]]>
