Audio problem: When the twins are practising in the house pool, Brianna farts and you can hear her say "whoopsie", but her mouth doesn't move. (00:07:10)
Audio problem: When Hilary Duff is Text Messaging her "Secret Admirer" the sounds of her pushing the phone's buttons don't match up with her fingers pushing the buttons.
Answer: Yes, this happens in most schools. The reason is that students are more likely to pay attention to announcements that are not made by a boring school employee. In many American schools, we have a phenomenon known as "home room". This is a short period usually first thing in the morning that is non-instructional when announcements are made, forms are filled out, and administrivial functions that don't have anything to do with any one class. At schools that don't have this, they have a thing called "study hall" or "independent study" which is a period where you sit in a classroom and work on your assignments, special functions for the school admin. like you are talking about are frequently done at these periods by students who are "working in the office" rather than studying. Then, there are schools that actually have classes in journalism, broadcasting, etc. where this activity would be part of the schoolwork.
Myridon