..... Gosh.
So complicated huh?
But you know, for me, this is what I did: (I have 2 kids).
I shopped around WITH my child, for a Preschool that would be compatible with my kid and which my kid liked. Too. I toured various Preschools.
Each Preschool, has different routines/rules/age entry rules, and hours.
So keep that in mind.
Some Preschools are rigid and all academic. Some are more play based but also teach "academics" and are nurturing. So YOU decide, which type appeals to you and/or your kid.
My daughter, went to a Preschool when she was about 3-4. SHE wanted to go to Preschool. She was THRILLED to go. The Preschool she liked, and which I also happened to like, was the one that I enrolled her in. It was a good good Preschool. Nurturing. Flexible schedules. It was year round. And the parent could choose, how many days a week they wanted their child to attend, and if it was for full days or half days. It was play based, but they taught a lot of "academics" too. They even learned all 50 States and all the Presidents and songs from Broadway musicals and about history and writing and math and cultures, on and on. BUT... it was taught in a play-based manner. NOT in a strict formal academic setting. And it was FUN. Not rigid.
My Son on the other hand, went to Preschool at about 4 years old. And only had 6 months of Preschool before he went to Kindergarten. And he was perfectly fine. He did not go to the same Preschool as my daughter. HE liked a different Preschool. I liked it too. It was suitable and compatible for him. It was a play based Preschool. Mixed ages. One room. Very nurturing. And the parents could choose, what days their child went, and if for full days or half days. It was not rigid at all.
He loved it. It was mostly social, but they also learned a ton.
In both cases, my kids went to different Preschools. It was suitable for them, and for me and per our schedules etc. Both Preschools had different approaches. But overall, it was not a RIGID academic school. Although they taught some academics, it was play based. And my kids thrived, in the school they attended.
My son only went 3 times a week half days.
My daughter started out with 3 times a week half days... but then, SHE WANTED to go, every day. So then we signed her up for 5 days a week. She, loved it.
My personal thoughts is: that a Preschool should not and does not have to be, a rigid preschool that only harps on ACADEMICS. Just because a Preschool is play based... it does NOT mean it is not "formal education."
The children are still learning. It is based on their age development. Just because one kid goes to a hard core formal academic based Preschool... it does not mean that they are better or smarter... than a child that went to a play-based Preschool.
Kids learn, via fun.
Just because something is fun... it does not mean they are not getting educated.