Turn on the light (by your feet) and jump to find the Bell Clapper hanging from the ceiling. Artur (a regular character in the Big Nate strip) is at the far right, if you want to talk to him.
It is in the secret store room behind the filing cabinet in the detention room on Big Nate Island. You need the blue prints from Nate's locker in order to access the secret room.
you climb up the rope
The clapper.
It it in the secret passage in the detention room on Big Nate Island.
in the detention room
The entrance to the secret room under the detention room is in the filing cabinet.
by the green cabnit and what is useful in the secret room is the bell clapper
In the file cabinet, in detention, in the school.
The missing bell clapper is hanging from the ceiling.
you ring the bell with the claper you got in the secret room.
You have to find the switch, which is down near your feet, and push it.
You have to find the switch, which is down near your feet, and push it.