There are probably more than 1 reason for her recent behavior:
- frustration, communication ability/inability per her age, being the oldest amongst younger kids, boredom, adjusting to her sibling (for sure), she is now in the twos' stage and its developmentally hard by nature, lack of structure (being 'busy' is not the same as being appropriately stimulated), lack of sleep and lack of naps, over-stimulation, lack of food, being tired etc.
And at any given time, ALL these things can really tweak a 2 year old.
I personally think, it would probably be nice for her to be among her own age group. BUT, at this age, many preschools or daycare facilities have "mixed age" groups. Or, it may be segregated by age, thus, different classes. So, you'd have to look into that... and see what school format would be best for her.
Going to her 'own' school, may be a bright spot for her... something special JUST for her, and yes, away from her sibling. This is beneficial as well. My daughter, started preschool at 3 almost 4 years old...BUT at a time when I was going to give birth to my 2nd child. My daughter LOVED LOVED LOVED her preschool and going. It was her own special time... and her own special friends and activities. But, she was ready for it per her age. She even told me she wanted to go to school already.
But, yes, like any child, they tantrum. But what is the cause? What is the trigger? There is always a cause and a trigger. So figure this out. EVEN IN SCHOOL, a toddler can do this... but that does not necessarily mean they "cannot" go to school. BUT, you have to gauge her 'readiness' and maturity for it. EACH child is different, no matter what their age is.
Have you simply ASKED your daughter what is wrong? Why she tantrums? Why she feels a certain way? Just talk with her and ask her, without judgment.
AND if she needs helps in adjusting to her sibling, which is common... then she will need more time with you and quality time. Somehow.
Bear in mind, that 'complete' adjustment to a new sibling can take time.... sometimes years. (my sister was like that). So it is an ongoing process....
What does your Hubby think?
talk with your daughter about it... see what she says... although she is just 2, she can perhaps in her own way, say something as to whether she likes or does not like her current situation. No matter what, a child likes to know they can have some input or at least have help about it.
If it were me, I would figure out what is triggering my child to be angry/frustrated and acting out. Then, I would consider my options and research it and preschools I have in mind, Then I would visit the preschools, with my child. Then I would review it and see where my child would fit in best, then I would discuss it with Hubby of course, then I would see what my child thought and how she reacted, then I would make a decision. AND in tandem with this, help her to adjust to any difficulties she may have in adjusting to being an "eldest" sibling (they can feel pressured by it and stressed), and then I would make a plan for helping her... perhaps a cute little calendar just for her and Mommy so that she knows that you both have plans together and she has something to look forward to.
PERHAPS, since she is the 'oldest' one at her home-care... maybe she is getting too much on her plate and too many expectations placed upon her???? Maybe, is she made 'responsible" for the younger ones? Or scolded more? Or stressed in any way? Is she HAPPY there? You might want to consider these things too. If there is only ONE care-provider for those 6 kids, maybe your daughter is by default, expected to 'assist?" I don't know...
And maybe she is just too busy there? Not enough down-time or nap time or what not. Is your daughter's "busy time" just self-led, or is there a routine and schedule and structure to the day? Some kids need this, or they get frustrated and 'lost' in the shuffle.
Really, ask your daughter what she does there... ALL day. And if she is happy there? Next, WHY does your daughter tantrum 'over every little thing' as they Provider says? THEN, what is done about it? What does the Provider do at these times, how does she discipline or not? Your Provider, MUST know why she is having tantrums. Or maybe she just needs more attentiveness.
I know for you, since you are a working Mom, you 'need' to put your daughter somewhere... I know it's not easy...
*On second thought, maybe changing her care provider now and having a new sibling all the same time, might be too much 'change' for her. I don't know...
All the best,
Susan