Just posting this link to a zoomable map of Rotherham school catchment areas in case people find it useful. Otherwise the only way to see which catchment you're in is to use the postcode checker on the council website -
www.google.com/maps/d/viewer?mid=1Oi8Lfs3EtCYCdDLj_CJHCV4khMI&ll=53.4083566523507%2C-1.285820000000058&z=11