This study aims to describe the learning process of reading and writing and the obstacles faced by third grade students of SDN 1 Sukadana in the 2024/2025 school year. This research is a type of descriptive qualitative research and uses a case study approach with the research subjects, namely 16 students in class III a and b, 2 homeroom teachers and 1 principal. Data collection techniques are: observation, interviews and documentation in the form of pictures and files. The data analysis techniques used are data reduction, data presentation and conclusion drawing. The data validity test used is source triangulation, technique triangulation and time triangulation. The results showed that: (1) The process of learning to read and write in class III is very good and in accordance with government regulations such as: making teaching modules, literacy for 15 minutes before the core lesson begins, implementing core lesson activities (introduction, core and closing activities), providing learning motivation, checking student notebooks. (2) The barriers to learning to read and write in class III are: lack of ability to remember letters, boredom and fatigue, lack of confidence, rarely taking notes or writing lesson material and rarely doing assignments and homework.(3) The causal factors (etiology) of the low reading and writing skills of third grade students are: low intelligence, low motivation to learn, lack of parental attention and the influence of playmates.