To start, let's define slating. Slating is what occurs, usually, when your child goes in for an audition. It is the first thing the actor does, while looking in to the camera. She states her name and the part she will be auditioning for.
However, as far as I am aware (from my experience with Dylan and Ellery), a slate is a slate. Some (print, commercial, theatrical) may ask for profile turns (meaning your child will need to turn to the side for a profile view; hair may need to be pulled away from the face in a mock pony tail), but some may not ask your child to do this.
While we're on the topic, the slate is the moment and opportunity your child has for his/her audience (the client/director/producer/casting associates/etc) to see him/her for the first time on tape. The casting crew in the room, conducting the slate are equally important. They are the ones that pass you on.
Make your slate count. Be real, with energy and most of all confidence. Own the room!
Taking a class from a well-known casting director can help you perfect your slate and your own personal "slating style."
In the beginning, before you are known by the casting offices, slates and headshots are your on-the-spot calling cards, in my experience. Make it count!
Best of luck from our family to yours,