Turn-around depends on the nature of the work. I've asked the teacher to flag when the work needs to be done by next day in order to move on to another step with the work. If it's not flagged this way, I let it sit for a day or two, because DS often has some frustration/anger built up about the work. I find it's easier to get him to work well if I let those feelings dissipate a bit.
Side-note: as time has gone on, I've seen less and less work come home. In talking to the teacher about this, we concluded that removing the specter of impending humiliation/punishment for incomplete work actually helped DS work more effectively and quickly. He wasn't wasting brain power fretting about what would happen if he didn't finish. So - for example - he now lists the previously reviled "Writer's Workshop" as among his favorite parts of class.
Sue
