Hello, I am currently a KS3 co-ordinator in a large comprehensive school (8 form entry). I am due to be taking over the running of the English department next year (the current subject head, who is also on the leadership team is being seconded for a year to a role elsewhere in the school). Both myself and the KS4 co-ordinator wish to trial mixed ability grouping for a number of reasons (initially due to logistics this would only be Y9 and 10). We have a lot of data and arguments to back us up and staff support however the Head and the outgoing HoD are against the change (primarily for PR reasons). Who decides, ultimately, in your department, how you group and set students? In your school, would the head be willing to listen if you had evidence and majority staff support? Have any of you moved from sets to mixed and if so, do you have any data to show it has been beneficial.