The Individual Education Plan (IEP) is a written document designed for each Student with Special Education Needs (SEN) in channeling special education services that suit their level of ability. Integrated Special Education Teachers play an important role in planning appropriate special education services for MBPK through the writing of quality IEPs based on the content of the Individuals with Disabilities Education Act (IDEA). This study was conducted to examine the level of knowledge of Integrated Special Education Teachers in developing a quality IEP based on 2 main components, namely 1) information about MBPK and 2) accommodation and modifications for Student with SEN. The design of this study is a quantitative study in which the study sample consists of 112 Integrated Special Education Teachers in the category of secondary school learning problems who teach in 14 schools in Hulu Langat district, Selangor. The Q-IEP instrument, which is a questionnaire with a 3-point Likert scale for 3 sections with 20 closed-ended question items, has been descriptively analyzed using the software Statistic Package For Social Science (SPSS) version 26. The findings of the study show that the quality of IEP writing is still at a worrying level because The information component about IEP is written incompletely. While the level of knowledge for general pedagogical knowledge is also at a moderate level regarding the accommodation and modification components. Nevertheless, the construction of instruments such as checklists, procedures and IEP production modules as well as training and courses are among the suggestions put forward to help Integrated Special Education Teachers improve their knowledge in IEP.