Students with cognitive disabilities deserve the same quality education as their peers. In an inclusive classroom, students with intellectual disabilities are not required to meet the grade-level standards. Instead, students with ID have their own set of achievable goals created for his or her specific needs (and indicated in the student's IEP).
The state of Wisconsin has created a set of alternate achievement standards for students with intellectual disabilities that are aligned with the achievement standards for the Common Core curriculum. These corresponding standards provide opportunities for the students with ID to work with the same material as his or her peers yet reach ability-level goals.
The English Language Arts alternate achievement standards can be found here. The Math alternate achievement standards can be found here. There are also alternate standards available for Science here.