How Did DACA Kids Get Into Public Schools?

So no ones really concerned about DACA at this point but I have a legitimate question here. So these DACA people were brought here as children right? And grew up here? Obviously they must have gotten an education so how exactly did they do that? Let’s face facts too he majority if not all were not homeschooled and went to public school. So how exactly did they get in? Do schools not check for proof of citizenship anymore or is that just in liberal states where they want to protect illegals to give them more voter base? Why did American tax payer money pay for these illegal immigrants to go to school? Like honestly how did these kids give to school? The schools should’ve seen that they were here illegally and deported them and their families immediately.