This document is a lesson plan in Chinese for a 5th grade class reviewing prepositions of location and using pictures to practice those prepositions. It includes vocabulary of common objects and prepositions like "on", "under", "in front of", and "behind". Students are asked questions about where objects are in relation to other objects and shown pictures to choose the correct preposition. Example questions include "Where is the dog?" and multiple choice answers of "on, under, in, behind" the object. The document aims to help students reinforce their understanding of prepositions of location.