Developing a new questionnaire as a tool used in data collection might be the greatest challenge. The survey must be both valid and reliable.The purpose of the paper is to describe the processes undertaken to develop the questionnaire to measure awareness and knowledge among who involves in the autistic learning environment. The researcher refers to the expertise to check the quality of the tool. Each expert independently evaluated all details regarding the relevance, the clarity, and the understandability of the instrument. The overall content of the questionnaire comprises of sensory stimulation, sensory sensitivity, sensory design, and physical learning environment.