Classroom

A classroom is a room in which a class of students is taught. In Hogwarts School of Witchcraft and Wizardry, several subjects have lessons take place in varying classrooms across the castle.

Greenhouses

 * Greenhouse One (Herbology)
 * Greenhouse Two (Herbology)
 * Greenhouse Three (Herbology)
 * Greenhouse Four (Herbology)
 * Greenhouse Five (Herbology)
 * Greenhouse Six (Herbology)
 * Greenhouse Seven (Herbology)

Dungeons

 * Dungeon Five (Potions)
 * Potion-Mixing Room (Potions; advanced students)
 * Potions Classroom (Potions)

Ground-floor

 * Classroom 11 (Divination; 1996-1998)
 * Classroom 1B (Transfiguration)

First-floor

 * Class 1 (Transfiguration)
 * Classroom (Advanced Arithmancy Studies)
 * Classroom (Ghoul Studies)
 * Classroom (used for storage)
 * Classroom (used for first-floor written exams)
 * Classroom 1A
 * Classroom 1C
 * Classroom 1D
 * Classroom 1E
 * Classroom 3C (Defence Against the Dark Arts)
 * Classroom 4F (History of Magic)
 * Muggle Studies Classroom (Muggle Studies

Second-floor

 * Class 31 (Defence Against the Dark Arts)

Third-floor

 * Class 34 (Transfiguration)
 * Class 72 (History of Magic)
 * Classroom 2E (Charms)
 * Classroom 3D

Fourth-floor

 * Class 67 (Magical Theory)

Fifth-floor

 * Art Classroom (Art and Muggle Art)
 * Classroom 5B
 * Music Classroom (Music and Muggle Music)

Sixth-floor

 * Classroom
 * Classroom 6A (Study of Ancient Runes)
 * Classroom 6B

Seventh-floor

 * Classroom 7A (Arithmancy)
 * Classroom 7B
 * Classroom 7C
 * Divination Classroom (Divination)

Higher floors

 * Classroom (Astronomy)

Unknown floor

 * Classroom (Care of Magical Creatures)
 * Classroom E-13 (used for Albus Dumbledore's homework help sessions)

North Tower

 * Class 104 (Xylomancy)

South Tower

 * Class 99 (Transfiguration)
 * Class 102 (Herbology)