VANCOUVER, Wash. (AP) -- The school district in Vancouver is investigating a third-grade teacher accused of using a "pay to potty" policy that required students to spend their fake classroom cash for bathroom breaks. Two parents complained after their children came home from Mill Plain Elementary School in clothes they were given after wetting themselves. KATU reports the teacher manages the class with fake money that students earn and can spend on toys, treats or going to the bathroom. Evergreen School District spokeswoman Gail Spolar says "pay to potty" is not district policy and students are not prevented from going to the restroom when they must. Spare clothes are kept at schools for accidents. A substitute is teaching the third-grade class while the teacher is under investigation.