You need to redefine perfect. When all the children have their block included, that's perfect. When all the blocks are put together is a reasonable fashion, that's perfect for this project. When it is handed over as a finished product and the teacher and children see what they have done (no one will remember who assembled it) that's perfect. If all the blocks were precisely cut and the seams were precisely matched, etc. that would look very ODD for a children's product. That's like doing your child's homework in your own handwriting because your child's handwriting is big and messy and not nice and neat like your own. This is their project, not yours. Don't put your signature quilting on it = keep their signature on it. In a really perfect world the kids would have also assembled the quilt blocks themselves.