Check that your printer is turned on, has paper, has ink/toner, paper in the correct tray. Next, check to see if an error message on the printer or one showing on your computer. If there is an error message present, a simple search of that code on a major search engine will typically yield a solution. If it’s not an obvious issue, there may be a connection problem – the printer is probably not connected to the network properly in which case you will need to search online how to connect your device to the internet. You can also reach out to your school administrator for assistance.