This document discusses intellectual disabilities (ID), noting that people with ID have lower IQs of varying severity levels. It describes classrooms for students with intellectual disabilities that were observed during student teaching. Students with ID require different levels of support depending on their abilities. The document also notes characteristics of ID like poor short-term memory and difficulty learning new skills through generalization. Intellectual disabilities can be linked to genetic syndromes or conditions like fetal alcohol syndrome. People with ID were not always treated well and were often institutionalized instead of receiving an education.