I don't know a thing about Big Picture schools but if it's a school that involves a lot of group work and your child was just diagnosed with autism I'd think real hard before moving her. Particularly if you have a situation that IS working for her.
You are articulating my biggest fear, of course. One question that DH and I need to ask the school is what kind of supports will be provided, particularly for group work. Her perspective is that she's not wild about working in groups, but she would like to learn to be better at it. I am loath to prevent her from trying to get better, of course, but I also don't want her to get herself into a situation where she can't succeed.
What you need to do is look at the personality and learning style of your own child. Do you know any parents of children who are already attending?
Unfortunately, the only parent I know at the school is not someone whose judgment I trust a great deal. I think that PBL is a great fit for my child (as long as she gets support learning to handle the EF issues), but working in groups is more problematic.
She will be able to attend for one day next week "shadowing" a current student, and I think that DH and I will be able to meet with the principal and discuss some of these issues. Hopefully that will throw some more light on the situation instead of just muddling it further.
Elizabeth, since your dd has just been recently diagnosed, I'd talk to whoever diagnosed her autism about the school and possible fit.
This is a good idea - I will put in a call to the psychologist. I've also left a message for her DITD consultant.