I often get few positive responses. Short Requests Instead of a long dragged out request to have children open their books to a given page, just say math book, page 2. Instead of it's now time to go to the cafeteria, please line up, saying the word cafeteria should be enough. Children should have the process memorized. Pencils, paper, etc., on desk should do the trick instead of please get out your pencils, papers, books, etc.
Students are often in denial.
They will say that they don't know. This usually brings a response from the student. Thomas Gordon states that if it doesn't work, don't keep doing it. There are many ways to get students' attention including having work on the board when they come in, dropping written notes on their desks asking them to be please follow along with the lesson, standing by their desks, calling on the talking students, etc. Be sure to daily communicate positively to all - young and old.