Little Horrors of Shop - S4-E4
Continuity mistake: When Dale & Hank are taking a spa in the house Dale is fumigating, Dale gets out of the spa. We see Hank has a headrest behind his head that is pink. The next shot is a close up of Hank's face and the headrest is now a light brown.
Little Horrors of Shop - S4-E4
Continuity mistake: Later in the episode, the students go over to Hank's garage to finish some of their class projects and gather around the workbench about halfway through the scene. Between shots some of the kids change positions including Joseph and one of the kids in a pink shirt.
Little Horrors of Shop - S4-E4
Continuity mistake: After Hank has been made to take forced leave from work, there is a shot of the house and the background you can tell by the color the sun is rising. In the next shot when Peggy is pretending to conduct in the kitchen with the kitchen utensil you can see a blue sky outside the kitchen window. There is no way the sun rose that quickly in the space of a second.
Little Horrors of Shop - S4-E4
Continuity mistake: During the scene where Peggy is taping a photo of Hank to the blackboard to discuss about the substitute teacher of the year. When she tapes it up you can see it's near the top of the board near the writing accompanying it. After a shot of the students the photo has moved down quite a bit along with the writing that was there.
Answer: If you are talking about the "Thou shalt not do this, thou shalt not do that" song, I'm not sure if a song like that actually exists. Green Day, the guest voices on the episode, might have just been improvising to keep their appearance from being too obvious.