This depends on the children. How they interact with one another in a group setting has a lot to do with this. It's important that they identify themselves as being seperate and posess the ability to socialize with others. Observe them in a crowd of other children. Also remember that children will behave in a completely different manner at school. Before deciding, see how they interact with others with and without one another. A few more questions to ask yourself. Do they rely to heavily on one another? If one child talks or acts for the entire group or another child, they may need to be seperated. Will their togetherness have an effect on their learning? Children have different learning styles and they may actually benefit from different teachers that can meet their unique needs. This is a very difficult decision, ask yourself these questions and get another point of view from someone else who sees them interact. Remember, you don't have to take their advice. Sometimes this helps you to see or notice things that you hadn't before. Keep your options open, if whatever you choose is not working out you can request that they be seperated or moved into the same class. Only you can answer this.

You should have the multiple children put in the same class so that they are able to all have the some homework and lessons so that it will be easy for them to all work as a group at home exc. Also it would be best incase finding friends could be hard with there siblings in the same class as them they will always have someone there and will feel more comfortable. =]

As a teacher I have had both occur. I would say the most important choice would be made by the parent and not the school. The school has not been there 24/7 as you have been. You might have a very strong preference one way or the other. Keep your rights as a parent and request input to the school.

It might be hard for Identical twins to settle easily into an environment, because they would have the same appearance, and kids might mistake them for each other. If it were me, I would get a little annoyed but not too much. When I was in school, twins were separated. They had plenty of individual charecteristics, so that set them apart. It also helped them be more independent of each other, because they had different classes, and different teachers.
In my opinion, I would have them separated. But like the other answerer said, I think it does depend on the kids and your own judgement.

My opinion is no. It will be very difficult for the teacher, especially if they look alike. It will also be difficult for the multiples because the sibilings with a outgoing personality will always try to stand out. The shy sibilings need that time in kindergarten to interact with other kids and maybe, with the teacher's help, they can learn to express themselves.
Also, you have to consider the school or school district policy. In many schools they do not like to allow twins or multiples in the same classrooms.
In addition, parents should think about their kids personality. If the twins or multiples have a tendency to just talk to one another and ignore everybody around them, they should be separated when they go to school.