This chapter introduces an international classification of functioning (ICF)-based assessment tool, the Functioning Scale of the Disability Evaluation System – Child version (FUNDES-Child) and its application in school settings. Children and youth with special needs from age two to 18 years in Taiwan receive evaluation and services from both the Ministry of Health and Welfare and the Ministry of Education based on the People with Disabilities Rights Protection Act and the Special Education Act. Since 1980, the Taiwanese government has applied certain legislative procedures to create and revise categories of disability. A person who fulfills the criteria for receiving disability benefits may be granted cash and in-kind services from the government. FUNDES-Child was developed in 2011as the tool for assessment of functioning and environmental factors in the disability evaluation system for children aged 6 – 18 years. The FUNDES-Child utilises a proxy format in which parents or caregivers answer questions about their child's activities in the previous 6 months.