This is a story I got out of a parent-teacher conference with Michel's teacher. He was potty-trined at this point, but in a special education setting, it's still normal practived to let a kid go to the bathroom no questions asked. But she had noticed that Micahel always seemed to want to go about 10 minutes before recess, as if to just kill time and get out of finiching his work. So she tested him and lo and behold, once it was time for recess he didn't have to go anymore!
BTW, the teacher here, "Wendy" is based on Michael's Special Education teacher in Kindergarten and First Grade. I consider her a minor-recurring charecter (similar to Becky) but I'm not quite sure when she'll make her next appearance.