This document provides instructions for an imaginary classroom exercise to practice prepositions of position using yes/no questions. It includes examples of questions and answers to find what is incorrectly positioned, such as "Is the sellotape on the students' clothes?" "Yes, that's right!" A list of 16 incorrectly positioned items in the imaginary classroom is provided to ask and answer questions about. Instructions are given to print the questions or write them by hand if printing is not possible. Related lessons on prepositions, dictionaries, and an online discussion forum are also listed.