As simple as it sounds, most Chromebook issues are resolved by restarting the device.
If restarting the Chromebook does not resolve the issue, there is a good chance that removing the account and readding it might.
Before doing this, note these two important things:
Google offers support pages that can address most common Chromebook issues. While the directions do not take the LPS environment into account, there are still many good troubleshooting ideas and learning resources here.
If none of the troubleshooting ideas on this page address or resolve your issues, your best course of action will be to submit a student Chromebook help ticket at your school. Each school handles these a bit differently, but your Teachers or Librarians will know where to direct you. LPS Computing Services visits each school, each day, to investigate student Chromebook issues. There should also be a supply of “loaner” devices that can be used until your Chromebook is returned to you.