S.M.
Can you go in and have lunch with her? I know my school welcomes the parents anytime. I often as I can (I work full time) go and have lunch with my little ones. I have 1 and 2nd grader. Then you can see friends and help her transition. You can also help in the classroom. And help her. Ask her about kids in the class by name, ask who she played with in recess. Maybe have some kids over for playdates to help her make friends. And yes, talk to the teacher, he/she can help your daugther participate, and keep an eye on her. Good luck!