To understand what a specific classroom labeled "MM" might be, you'd need more information, such as:
* The school or district: Contacting the school directly is the best way to find out.
* The grade level: The type of classroom will differ significantly for elementary vs. secondary students.
* The students' disabilities: The classroom's focus (e.g., autism, learning disabilities, emotional disturbance) will influence its name.
Without additional context, "MM" is simply not enough information to define a special education classroom.