You don't get behind it, you have to click on the bottom two drawers and climb down the ladder that appears.
~ Hope this helps!
you put the stinkbomb on the floor of the detention room and the teacher will leave then you click on the filing cabinet
you can not. you have to go in it.
The "blueprint" in Big Nate's Locker (combination 9305 is on the comics) shows the location of the "secret room" in the school. It is in the Detention Room, behind the filing cabinet. To get there, you will need the gum and the stink bomb. Chew the gum, use the stink bomb, and go behind the filing cabinet. (see related question below)
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.
Among the tons of junk crammed into the locker is the blueprint to the school. It shows the secret room behind the filing cabinet in the detention room. (see related question)
set of your stink bomb to get to the filing cabinet and when your inside the cabinet you will figure it out from there.your welcome
As you go into the floor behind the filing cabinet in the detention room, the light switch is right at the bottom of the ladder, on the floor.
It is behind the filing cabinet. You must open Nate's locker on the second level. Pick up the blueprint from the pile in front of it. (see related question)
You use it when you get put in detention for chewing gum so you can get into the filing cabinet.
Use the Stink Bomb that you can make in the Science Room. (Mix the yellow and blue chemicals and heat them.) Once she is gone, you can open the secret room behind the filing cabinet. You have to have the Blueprint from Nate's Locker. (see related question)
You can't access the Filing Cabinet unless you have the Blueprint showing where the secret room is. Use Nate's combination to open his locker, and get the blueprint from the pile of papers. Now you can access the room below the filing cabinet.
The blueprint to the secret room is in Nate's locker (along with a million other things). The locker combination is 9305 and the blueprint will show the location of the door behind the filing cabinet in Detention. The room below has the missing bell clapper for the school bell. You need the locker opened or the filing cabinet won't open up.