The Roku Channel has no parental control level appropriate for early teens. There is a parental control for viewing by children and for older pre-teens, but then it's like teens don't exist because the next 'parental control' is for content up to 18A. There is clearly a need for a a parental control for which the limit is 14A.
Look forward to hearing when this is added because we won't be using the Roku streaming service until it's in place.