According to the contract, 5.H.2. Special Meetings:
The principal may call special faculty meetings as needed. No formal agenda is required, but meetings are limited to a single topic. Meetings shall be thirty (30) minutes or less. Teachers shall not be required to attend more than three (3) special faculty meetings per semester, unless the principal and steward agree otherwise.
Please let us know if your Principal is violating the spirit of the contract. Email email@example.com.