Dear littleone:
You've been working hard with this difficult situation: good for you for reaching out. I think I can help you with this situation, though what I will recommend will be a bit "off the beaten path," at least in some parents' minds.
Children of 9 can have lots of feelings about separation: about the present separation from her familiar home and friends and school and stepfather, as well as a storehouse of feelings that are left over from early childhood. Some children seem to be more sensitive to separation situations than others, because early in their lives, they had experiences that felt to them like more of a threat than the early experiences of siblings or other children their age. For instance, children who ever spent time alone in the hospital, at birth or at any time in early childhood, were separated from a parent under really difficult circumstances. Though they are just fine in most situations, when a big separation like this comes up, feeling very threatened, as a very small and helpless child might feel, gets triggered. They can't escape the feelings of fear and threat, no matter how hard they try. Feelings, when they flood a child's limbic system (the social and emotional center of the brain), simply take over, and a child can't possibly be rational. We can't, either--feelings shut down the reasoning we ordinarily have, and it returns when the feeling has subsided, which is why she's wonderful as soon as she doesn't have to go to school. That threat of separation is gone, and the feeling (which is probably at least in part coming from some much earlier incident of separation, because it's so strong) subsides. Her prefrontal cortex switches on again, and she's herself.
Here's what to do! Feelings, when they get triggered, govern a child's behavior and their interpretation of reality. Situations that are clearly safe suddenly become "threatening" because they are painted by the feelings that are leaping out of a past incident. How feelings can be healed, and a child's behavior and perspective can become more reasonable, is to set an expectation that the child will function reasonably. In this case, it's "You're going to school today. It's a good place. You'll be safe there, and you can come home at 3 pm. I'll see you then." This expectation (very kindly offered--if you're angry while offering it, this won't work so well because your upset is coloring the situation, and is making it feel unsafe) is necessary to trigger her big fears and pull them out of their hiding place in her memory. Once she is upset, get close, put your arm around her if you can, and keep saying, "Today is a school day"==actually, I would do this on the night before, to try to trigger the feelings early so you have time to do the next step.
Then, Staylisten. Stay with her, offer warm eye contact and your support. Be there to listen to her feelings. Listen. Don't talk, don't ask lots of questions. All that is an attempt to engage her prefrontal cortex, which isn't working well. She needs to feel your love, so she can tell you how awful it will be to go to school, and how scared she will be to be there without you. Listen. But keep saying, "I know it's hard. But it's a school day. You're going to go, and you'll be safe." Let the tantrums and crying begin. Listen. Let her have her huge, awful, I'm desperate, I won't live through this feelings. Stay with her and listen. Don't argue. Don't reason. Just say, I know it might be hard, but I am sure you'll be safe. And I'll see you when school is over." She needs to have someone listen carefully to all the feelings, before they can lose their power. One good long cry/tantrum/struggle/trembling desperate episode--you can expect it to last an hour or more--can change a child's perspective entirely. Sometimes, if there's a big early hardship stored in her emotional memory (like time in the NICU, or treatment for jaundice, or any early long separation from you for any reason), you'll need to listen several times before she can actually make it to school. But this process of Staylistening and offering connection and caring, while still holding the expectation, and letting her have her feelings as big and awful and passionate as she can, is very very very effective. Feelings release in tantrums and crying, and they lose their power, gradually, over a child's perspective, and over a child's behavior.
If you've listened and stayed with her through a giant cry, and tantrum, she will, if you've been able to hang in there with her, probably end the time with big sobs, and lean into you and feel very close to you and loved by you, even though she's been hating you and protesting every wrong thing that ever happened in her life. Hang in until it shifts. It will, if you listen. After it shifts, ask her if she's ready now to go to school. If you have to start this on a school morning, it might be halfway through the morning before she comes all the way through this emotional work. If she's ready, take her in. If you both judge that it's not going to be great to go midday, then tell her she's done a good job of showing you how it gets inside for her, and let her have another day. She may or may not have more big emotional work to do the next day, but one of those days soon, she will be ready to go to school.
There is more about this approach, which we call Parenting by Connection, at <
www.handinhandparenting.org> It's an approach that gives a child lots of reassurance, but doesn't ultimately give in on the limit--the deal is that she needs to go to school, and that, more importantly, school is a good and safe place for her. She's not threatened there. Keep repeating that while she's crying and having her tantrums. That reassurance addresses the deep roots of the fear she feels, rather than the rules that "have to be followed" to be a regular person. You just make room for the feelings that are driving her, and you, nuts. Make room for them, accept them, let her be tossed through the stormy seas of her "emotional bad dream," and steer her little boat with a good hand on the rudder, telling her that she's safe, that she'll always see you again. There are little baby feelings stuck inside that need to be listened to before she can be free of them and think reasonably again.
We have a set of booklets that explain this process at the website above: Listening to Children. A mom I know with much the same problem resolved it in a short amount of time using Staylistening---she's just full of backed up emotions that need release. Listen. Let her go totally ballistic. Listen and love her. Hold the expectation. Magic will happen!
Hope it helps!