In the lyceum where I studied, there was one lab on Physics, where the book that accompanied the lab was deliberately wrong. We were told to perform an experiment that "should" support a certain conclusion, but actually neither the "correct" conclusion nor its opposite could be done because of the flawed setup which measured something slightly different. A lot of students (in some groups, all students) fell into this trap and submitted paperwork with the "correct" conclusion according to the book.