Add a new rule, “The Break”:

At any time on Saturday or Sunday the Professor may make a Bell Post. On Monday, if the Class is not on Detention, anybody may make a Bell Post. Anyway a Bell Post can be made only if no such post has been made in the last three days. A Bell Post is a Story Post containing “BELL” in the title, and any onomatopoeic word the Author may consider fitting to represent a ringing bell should be included in its body text. A Bell Post is considered Open if there is not a Back to Classroom Comment (acronym: BCC) on it. A BCC is a Comment to a Bell Post only containing the words “Back to classroom”. The Professor may make a BCC on any Bell Post, and on Tuesdays, Wednesdays, Thursdays and Fridays anybody can make a BCC to an Open Bell Post. Anyway, BCC’s can only be made on Bell Posts that are older than 48 hours. An Open Bell Post should be kept sticky.
If a Bell Post is Open, the Class is known to be having a Break.