Actually it's the other way around. Scuttlebutt from several elementary school teachers in CSF is that a larger and larger number of parents are sending their children to Prairie, Rossville, and Central. Heck, a Clinton Central school bus comes into town every morning around 7:30am to pick up a load of 15-20 students at the parking lot of a local church building. Then bring them back after school. Not sure if Prairie and Rossville do that same.
It's no secret that Westfield is aiming to gobble up and annex all the land around Sheridan. Saw something in the Indy Star about it recently.