Ned's Declassified School Survival Guide (2004)
0 continuity mistakes in show generally - chronological order
Starring: Daniel Curtis Lee, Devon Werkheiser, Kyle Swann, Lindsey Shaw
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Art Class & Lost and Found - S3-E5
Other mistake: Ned paints a rather obscene painting and brings it up to his teacher. He had just painted the painting and his teacher gets angry at the school cutting the art budget, so Ned holds the painting against his chest. When he takes it off his chest, there is no paint on his chest and the painting had no chance to dry before he put it on his chest.