I moved a good amount as a kid, then married my husband who is now a retired Marine. We moved a lot and our kids have gone to many different schoosl. My son turns 17 tomorrow and we finally bought a house a few months ago and this is his 14th home. My triplets are 7 and this is their 7th home. It's hard but with the right transition kids bounce back quickly.
My husband lived in the same house his entire life in a small town that I call "Mayberry". It even has a Main Street and every time I walk down it I whistle the Andy Griffith theme, lol.
My husband also went to a small school that went from kindergarten through 12th, smaller than the one you describe. I think they had 30 kids in their graduating class when hubby went there, and it's no bigger today. It was and still is a very nice school and is rated high. They always had new books and desks and did very well in sports.
I think the size isn't what should matter. That will probably be a plus for the students. More intimate. Less possibilities for students to get lost in the crowd, like at my high school that started with over 900 students in 9th grade and by graduation we lost 1/3 of the students due to drop out and just not enough help for the kids. We had 6-8 counselors for the entire school so they only helped the kids they knew would make it. The rest of us went by the wayside. We were scheduled to see our counselor once a year by appointment and if you needed them other than that you were out of luck because they just didn't have the time. Because my last name started with T I didn't get seen until later in the year so by then I had failed classes and no one to encourage me to go on. So with all the different schools I and my kids have gone to I think smaller schools tend to better.
In order to help your daughter transition, take her for a school tour to meet hopefully meet her teacher and other people who work their like the librarian, office workers and so on. Everything you talk about concerning school must be done positively and be excited for her. Everything you talk about needs to be done with excitement. Show her the school web site and things that the school does. Let her know what her teacher's name may be. You can also do that for area things so she can be excited about moving alll together. Show her online things that you'll be able to do in her new area. Remind that she will make new friends and can email and write her old friends too so she'll have twice as many friends. Don't focus so much on everything as she will sense your tension and concern. She's young and kids bounce back easier when they're younger. The older they get the more social they become and the harder it is to move so she'll do fine as long as she see you and everyone showing a positive attitude and excitement about the new place you're going to.
One thing you can do for yourself is check the school rating online. There are different web sites that describe schools and give ratings and people will post reviews as well.
K. B
mom to 5 including triplets