Jacqueline Reeve, Library Media Specialist, Writer, and Parent
Many public schools automatically separate twins so they have a chance to grow socially without each other. The feeling is that yes, having twins together would be a hindrance to them socially and possibly a distraction for the class.
But my daughter's Montessori keeps twins together, and I actually like that approach. Since Montessori classrooms have a range of ages together, they try to keep all siblings together if they're within the age range. I think it helps them learn teamwork that can extend to family life, and it's definitely easier for parents to manage the classroom responsibilities of one teacher vs. two. The focus is on building a community that works together, and in that kind of situation I think it's great to keep multiples in the same class.
In the end, I think it depends on the individual kids and what their teachers and parents think will work for them.