Isn’t that basically a Montessori school?

"The Montessori method of education is an educational method developed by Italian physician Maria Montessori. Emphasizing independence, it views children as naturally eager for knowledge and capable of initiating learning in a sufficiently supportive and well-prepared learning environment. It discourages some conventional measures of achievement, such as grades and tests."

You might take a look at the "unschooling" movement: https://en.wikipedia.org/wiki/Unschooling

I don't have any first-hand knowledge of how such initiatives work in practice; but at a high level, it's like home-schooling with more community involvement and socialization, as well as off-site learning experiences. I've also heard of some families who do half-and-half between a formal school environment, and unschooling/homeschooling.