Today, Ministry of Education in Thailand realizes a significance of one disability among the student called Learning Disabilities or LD which is not caused by physical or intellectual impairment or retardation but rather resulted from various factors adversely affecting the brain e.g. genetic or inheritable factor or impact on brain development during pregnancy or toxic substances which precludes the brain from normally functioning or interpreting data [1]. The number of LD student is increasing whereas the use of assistive technology is limit. Assistive technology will help increasing ability or adjusting proficiency of LD student to learn effectively. Therefore Thai Word Prediction Program is designed and developed in order to enhance LD student in their writing.