Portable Network Graphics
Be sure that you have an application to open this file type before downloading and/or purchasing.
This useful sign will encourage your students to stay motivated from time to time. You can use it for decoration as well or simply to prompt students to do something such as reminding them, "to put away their phones".
You may print it on card stock in full color at home and staple on the wall. To conserve it for longer, you may laminate it.
The sign is a PNG file, meaning that it is a high resolution image and it can be inserted in Microsoft Word or PowerPoint.