Maria Montessori was the first woman to receive a PhD in Medicine in Italy. She developed her pedagogical method by working in clinics with children with intellectual disabilities, and then observing children of orderly development in children's houses. Montessori concludes that every child is an exceptional individual, that is, a man worthy of respect. She has put a child at the center of the educational process who has his own freedom, needs, and desires. Montessori singles out three developmental periods in each child. At each developmental stage, the child has different options and needs. For a child to develop optimally, an adult must give the child freedom and support, at any developmental stage. Montessori also notes periods of special sensitivity for speech development, for order, for movement, etc. One of the basic requirements of this method is the prepared environment. The environment plays an important role in the development of the child. She needs to be sure so that the child can move unhindered and explore the world around him. Maria Montessori's contribution is also seen in detailed material that are self-corrective and aim to ensure the child's independence and development of motor skills, creativity, muscles, etc. Groups in Montessori kindergartens are mixed and based on togetherness. This final thesis will also analyze the deviations that come from disrespecting the child and replacing the child in his work. This work also includes Montessori pedagogy today in the world and Croatia and the work of the only primary Montessori school in Croatia.