Classroom Mezuza

Question: Do we need to affix mezuzos to classrooms?

Answer: The Gemara (Yuma 11b) teaches that there is a machlokes as to whether one places a mezuza on the entrance to a beis haknesses. The Shulchan Aruch (YD 286:3) writes that a beis haknesses doorway is exempt from a mezuza unless someone lives in the shul building. However, he writes that there is a machlokes (YD 286:10) as to whether a beis hamedrash doorway requires a mezuza, concluding that it is ideal to affix one, albeit without reciting a beracha. The Shach (YD 286:19) explains that as the students learn there all day, it is considered to be a place of habitat.

Nonetheless, the Shulchan Aruch (YD 286:11) writes that a shop in a market is exempt. The Taz (YD 286:10) explains that such shops remain empty at nights. Nonetheless, a regular classroom contains equipment and supplies that the teachers and students need to teach and learn. As such, it should be obligated with a mezuza (see Kobetz Beis Levi 2:5753)

R’ Ephraim Greenblatt (Rivevos Ephraim 5:545) writes that classrooms have the same status as a beis Hamedrash and one is obligated to affix one, though without a beracha.

In conclusion, one should affix a mezuza to a classroom without reciting a beracha.