Here are the characters and their genders

Teacher: Four♂️

Students: Pencil♀️

Bracelety♀️

Liy♀️

Roboty♂️ (Only says BEEP)

8-Ball♂️

Stapy♂️

David♂️ (Only says Aw Seriously?)

Match♀️

Firey Jr.♂️

Dora♀️ (Only says Dadadadada)

Rule: NO ESCAPING

Everyone is bored spending the rest of their lives in that prison and they also have to do Algebra

There is cobwebs and bugs at the EXIT