Public School 201

Public School 201, shortened to P.S 201, is the local school of River City. The only known student, other than the ones that participated in the science fair, is CJ, and the only known teacher is Mr. Silva, the science teacher.

Role In Shrink Ray Island
It hosts many science fairs, all of which CJ has won.

Role In Night Watch Island
It's sports team, the River City Rodents, happens to be very popular throughout Poptropica; judging by the fact that a Rodents banner was seen in the Sluggers store in the Twin Palms Mall.