Parents are generally not allowed to park on the school premises. An exception to this might be if a parent is helping out in school (eg. with reading), or where a child is being collected or dropped off during the school day (eg. if they have been to the doctor or are being collected because they are unwell).
Care should be taken when parking outside on the road as there are restrictions at certain times of the day. Also we ask that parents show consideration to local residents by not parking across their driveways, even if just dropping children off.