A teacher punishes a student by locking him in the classroom. He wants to get out of the room. Lets help him to do that.
Here is the hint
Click the blue color bag on the table
Click the zip of the bag pouch to open and get a flash drive from it.
Take a paper from the second table of second row from the left.
Take ruler from the green bag.
Get cutter from the red bag.
Click on the wall clock
Drag the cutter to the wall clock ...