This presentation discusses keeping the school environment clean through cleaning windows, throwing out garbage properly, cleaning the school yard, picking up junk, and wiping desks. It emphasizes the importance of cleaning windows to bring in light and create a comfortable setting for classes, throwing out garbage in designated areas to protect the environment, cleaning the school yard as a way to clean the environment, collecting and handling junk that is found anywhere, and having each person keep their desk clean. The overall message is about maintaining a clean school environment through various cleaning activities.