Perhaps Los Angeles' C.J. Pizarro, AKA Mista Cookie Jar, was a fairly typical 4th grade classroom parent -- you know, donating tissue paper or markers when asked, contributing to the teacher gift. But he also helped create the song and video below, in which the kids look like they're having a blast. They also learned how to round numbers, though I'm kinda thinkin' Mr. Valdez taught them that before they recorded "Room 28 (That's How We Roll)." (Should you care to, you can download the track here.)
Mista Cookie Jar and the Chocolate Chips - "Room 28 (That's How We Roll)" [YouTube]