Which of the following is NOT allowed in the classrooms according to building regulations?

Eating food in classrooms can be disruptive and create health and cleanliness issues, which is why many educational building regulations prohibit it. Food can lead to messes that require additional cleaning, and it may also encourage pests. Additionally, consuming food can detract from the learning environment and focus, as it may create distractions among students.

Drinking water, using AV equipment with permission, and personal item maintenance are generally allowed because they contribute to maintaining a conducive learning atmosphere. Drinking water is essential for hydration and is typically seen as necessary for students' well-being. Using audiovisual equipment with permission ensures that necessary instructional tools are available without causing disruptions. Lastly, allowing personal item maintenance can help students remain organized and focused, which supports their educational experience.