It seems like she is having a hard time with trust. There could be more problems going on at home and in her personal life that she is having trouble with and doesn't want to get made fun of, so its easier for her to just be alone. I would try to gain her trust slowly. You could work with her one and one and give her time to just talk things out if she opens up to you eventually. Find her interests and then see if another student shares those same interests and see if she will get along with them.

Possibly try getting close to her yourself, there's an obvious trust issue she has with her peers they could've done something behind her back that you don't know of or it could be other personal reasons. Building up trust between the two of you could have her open up and you can sit her next to another trusted student (probably the nicest one you have) and see if maybe just one partner can be enough for her to handle. If this doesn't work maybe try telling her the benefits of learning teamwork or call a parent to explain the situation.

The student may have trust issues, be shy or may even be bullied by other students. I would watch her interactions with her other peers and call her parents to discuss the issue. Try a community building activity such as a field trip, which brings the class closer together. It may be best to first start with pairing her up with one person on a simple activity and explaining to her the benefits of collaborative work. Hopefully she will warm up to the idea of working in a group.

At some activities, she can choose to work alone. You do not want that she feels the pressure of working in groups, but always give her the chance to choose one or the other. Explain to her that there are going to be occasions when she has to work with other, but that is not always be the case.

I would talk to the student privately and explain how it is good to have friends. Also, I would ask if there are any specific reasons as to why she does isolate herself and whether or not the other kids are being mean to her.

Read aloud time could benefit this student greatly. It creates a sense of community and may make her feel more comfortable within the classroom. I'd also dig a bit deeper to see if there are issues outside of the school setting. Try having a one on one lunch with your student where you get to know her. If she sees that she can trust you, she may be willing to open up more to her fellow classmates.

The student seems to be more of an introvert and may feel anxious when working with other students. However, there are some requirements for group work. Maybe creating a fun group activity to ease her into being more open with working with other students. Making it feel less like work and more like she is participating in fun. An outside day with group challenges?

It seems like the student may not feel comfortable with the students. Maybe some ice breakers and trust exercises will slowly allow her to integrate,

Some students like their own space but, talking with this student to understand the reasons behind it may help. I would try to find activities she enjoys and slowly try to get her involved with other students.

You can accommodate this student by providing break times for the student to work alone, away from other students. When the student does work in groups, you can have her work in teacher-facilitated small groups.

Try talking to her, if she feels comfortable with you and trusts you, she'll trust you to put her in a safe environment.

A solution would be to have a discussion with the CT,student and parents describes the importance of collaborative group work. If that does not work I would suggest to my CT that she moves the students seat away from her group like the student suggests.This should be allowed as long as she is still completing and turning in work. Also doing some team building activities inside or outside the classroom could help create a since of community and bring her together with the class.