The principal’s office or the hallways should be decorated with balloons. It’s an amazing and simple thing to make the atmosphere so festive without doing any harm. 

Through the teachers, you get to experience that students and teachers swap the classrooms for a day. Think about the chaos when the students walk into their math class and realize that they are in the English room!

The school lawn will be a scene of various augmented reality structures like flamingos, unicorns, or giant beach balls that will float on it. It will create a new and amusing atmosphere for the campus. 

Substitute the apples in the cafeteria with plastic ones which are wrapped in aluminum foil. It will inevitably leave everyone with a mess in their mouth when they try to chew. 

Prepare a friend’s desk with a water bomb and some plastic fish to give a sudden aquatic splash. Remember to clean up the mess after you are done, surely!

Encircle the common places like doorways, benches, or even the principal’s car with several layers of clear plastic wrap. It’s the usual joke that always succeeds in making people laugh. 

Put fake bugs or spiders in strange places around the school like lockers, under desks, or on classroom chairs. Watch how your classmates leap in wonder!

Modify the food item labels in the cafeteria, thus students will get the meals they didn’t expect. Yet, you should be careful that it is still in good humor and not offensive. 

The toilet seats will be covered with a transparent plastic wrap, which will make them look normal at first glance. It is a benign prank that will make everyone laugh in the bathroom. 

Draft messages or sketch pictures on the classroom whiteboards with invisible ink pens. The surprise will be revealed when the teacher will try to erase the board!

Arrange with your classmates to swap book covers in the school library. It will be a source of confusion and fun for anyone who is trying to find their next read.  

Create a mural on a blank wall with the help of Post-it notes. Every note is a part of the bigger picture and, thus, the wall becomes a joint art project.  

Put flowers or small potted plants in extraordinary places around the school, for instance on windowsills or in the courtyard. It is a thoughtful way to make the environment more lively. 

Exchange classroom chairs with musical chairs for a day. When the bell rings, students have to find a new seat, hence their usual routine becomes more exciting. 

Create a memory wall with pictures and souvenirs from your school life. It is a heartfelt way to reminisce and commemorate your journey together. 

 Leave motivational messages or compliments on lockers, desks, or bathroom mirrors to inspire your fellow students.  

Paint the glow-in-the-dark designs on the walls, floors, or ceilings of the school. The lights will go off, and the hidden artwork will be found, thus the magical ambiance will be created.  

Design a digital scavenger hunt or QR code trail in the school, which will lead students to the hidden clues and messages.  

Then, you cheat by fabricating fake diplomas and distributing them to the recipients who have no idea that they are fake during the ceremony. The actual ones should be made available to avoid any assumptions and misunderstandings. 

The confetti cannons should be installed at a certain time during the graduation ceremony, for example, when the principal is giving a speech or when the caps are being thrown. Thus, it will add another strange and nice aspect to the event.  

The graduation ceremony should end with a dramatic fireworks show, which will illuminate the sky as you say goodbye to your high school years and look forward to the future.