Abstract: Hearing disabilities may be significantly limited in their ability to recognize and process information, especially the types of information as it is currently presented in basic educational curriculums in Thailand. They may be slower than normal children in acquiring the knowledge and skills they are expected to learn from the core curriculum of basic education. Hearing impaired children are dependent on specific factors in their environment for successful learning and individual development yourself to reach the same level of achievement as normal children. To identify these factors and propose, a method for teaching the hearing impaired which recognizes these factors and is adapted for the specific learning requirements of the hearing impaired is the purpose of this research. Educational elements and other conditions which affect the achievement of hearing impaired children were studied in a population of students who have defective hearing at the School for the Deaf in Bangkok and its vicinity. A sample of 195 students from grade levels 1-6 was selected. Research approaches included data collection using questionnaires, forms, interviews as well as discussion groups and workshops that included a sign language interpreter. These techniques were used to elucidate and assist in analyzing the collected data related to the factors influencing the learning achievement of the hearing impaired students. The resulting analysis revealed that the main elements that affect the achievement of the hearing could be divided into four categories, namely: characteristics of the teacher, learning environment, quality of family life and educational support.