My students are given a "Think Sheet" after a couple of warnings.
They are asked to stop working, and sit to the side of the room to reflect on their behavior, and fill out the think sheet.
After a few minutes and completing the sheet, they may join the class again.
The sheet includes images which helps younger students understand what they have done incorrectly, and is easier for bilingual parents to understand when the sheet goes home.
Clip Art Credit