Education is important for humans to gain prosperity and happiness in life, so it can be said that education is a person's basic need in order to become a real human being as a whole. In this day and age, students are not only required to be able to master technology and information to compete, students are required to think critically which is more developed in order to solve problems that will occur. This study aims to determine the extent to which students are able to think critically through social studies subjects. This research uses descriptive quantitative research methods or non-experimental methods. The results showed that grade 5 students at SD Negeri Pucung Kidul 03 had a critical thinking attitude in the very good category.

This research discusses the role of teachers in developing the spoken and written language of early childhood at RA Labschool IAIS Sambas.  Early childhood is an important period in language development. In this phase, children learn not only to speak verbally but also begin to recognize letters and numbers. The role of teachers in developing spoken and written language in early childhood is very vital. Teachers have the responsibility to create an environment that supports children's language development, both verbally and in writing. As a result of this research, researchers found that the role of teachers is very important in developing oral and written language skills in early childhood, including developing fine motor skills, understanding letter concepts, and the ability to compose words or sentences.