you need to get the bell ringer and ring the school bell to get them away.
first get rid of the girls then put peanut butter crackers there.
Where the girls are talking, but you have to get rid of them.
The bell on Big Nate Island on poptropica is located on the top school building. To reach it when you have the clapper, you need to get rid of the seagull there. (see related question)
You have to get rid of the girls by ringing the bell after you make a stink bomb in the school and got rid of the principle and go to the file cabinet then dig exactly where the girls were. (See your map)
use the lobster that you can get after completing cap'n salty's quest
You get rid of it by using the lobster to clamp onto the light in the lighthouse and turning it in the direction of the school.
To get the seagull away, you have to turn the lighthouse light. Use the lobster.
It is buried beneath the park but you have to get rid of the seagul, fix the bell, then after you fix the bell the girls in the park will move then you have to give the dog a peanut butter cookie treat by where the girls were standing, and that's where the chest is
use lopster and turn the light on the lighthouse
You have to find the bell clapper by getting detention and by going in the file cabinet. Put the clapper in the bell and it will ring bringing the girls from the playground.
you ring the bell in the school you must find the ringer search walk through on big Nate on poptropicaa to find out more
you use the stink bomb to get rid of the teacher and then click on it and it should open if you have the locker combo and the 'map' to the cabnet and it WILL open!