We all know that kids love tilting back in their chairs and we also know that sometimes they fall back! Besides being dangerous, this can also be distracting for the other students. Remedy this situation by placing strips of tape on the floor of those students that find it hard to stay on the ground. Tell them that it's important for them (for their own safety) to keep the legs of the chair on the ground, and until they are able to remember it on their own, you're going to help them by marking spots on the floor where the chair legs need to be at all times.