International Building Code Section 305

International Building Code 305.1

Educational Group E. Educational Group E occupancy
includes, among others, the use of a building or structure, or a
portion thereof, by six or more persons at any one time for educational
purposes through the 12th grade. Religious educational
rooms and religious auditoriums, which are accessory to
places of religious worship in accordance with Section 508.3.1
and have occupant loads of less than 100, shall be classified as
A-3 occupancies.

International Building Code 305.2

Day care. The use of a building or structure, or portion
thereof, for educational, supervision or personal care services
for more than five children older than 21/2 years of age, shall be
classified as a Group E occupancy.