A building or structure used by 6 or more persons at any time for educational purposes (through 12th grade) must be classified as a __________ occupancy.

The classification of a building or structure that is used by six or more persons for educational purposes, specifically for grades up to 12, falls under Group E occupancy. This classification is detailed in building codes that categorize structures based on their intended use, which influences safety regulations, construction standards, and occupancy limits.

Group E occupancy is designated for educational facilities such as schools and daycares where the primary function is to provide educational services for children and young adults. The defining characteristic of this group is the focus on educational activities and the presence of young occupants, who may have special safety considerations.

In contrast, the other classifications pertain to different usage scenarios. Group B encompasses business occupancies, which are typically tailored for offices and professional use rather than educational purposes. Group F includes factory and industrial spaces focused on manufacturing, while Group H refers to high-hazard occupancies that involve materials posing significant health risks or hazards. Since the question specifically addresses educational use, Group E is the appropriate classification.