Water and electronics generally do not make happy bedfellows. Your iPad is not designed to be water resistant. While it will survive being splashed with water if immediately dried, it will almost certainly suffer irreparable damage if it is allowed to get wet, or is submerged for any length of time.
If the worst should happen, speed is essential. If the iPad gets wet, it should be immediately dried with an absorbent towel - then set aside in a warm, dry location to throughly dry. If the iPad should be turned-off - and no attempt made to turn-on, use, or charge the iPad until you are absolutely certain that the iPad has fully dried out. Pay particular attention to the charging port.
You mention that your iPad is a "school iPad". If owned by your School, you should contact the Administrator that manages your school devices - as the School will need to know about the issue - and will be able to guide you as to what you need to do.
Otherwise, if the iPad is owned by you and the School itself has no interest, a visit to the Genius Bar at your local Apple Store or Apple Authorised Service Provider (AASP) will provide opportunity for the technicians to test and assess your iPad damage. If the iPad is your own, here you will be able to explore your available options for repair or replacement:
Genius Bar Reservation and Apple Support Options - Apple
