What kind of idea is "reasonable accommodation"? Is it different from special treatment?

It's an idea shared internationally in the Convention on the Rights of Persons with Disabilities. Rather than asking the person to make all the effort, it means adjusting the surrounding environment and ways of doing things within a reasonable range. For example, adding pictures to spoken instructions, adjusting the amount of work, or seating the child in a spot with less stimulation. It's not "special treatment," but an adjustment so the child can stand at the same starting line as other children. Since the way it's structured and what it's called differ by country and region, try asking the childcare setting, school, or local government "what kinds of adjustments can we request."