A special education teacher in a 6:1:1 classroom will work with 6 students and one paraprofessional.
As a 6:1:1 teacher, you might work with students with very high needs in most or all areas, including academic, social and/or interpersonal development, physical development, and management.
6:1:1 classes provide highly intensive individual programming, continual adult supervision, a specialized behavior management program to engage in all tasks, and a program of speech/language therapy (which may include augmentative/alternative communication).
You can find more information about 6:1:1 classrooms here.