Welcome to Teachers College. The purpose of this Agreement is to promote and improve the quality of education at the.Employees who qualify shall be eligible for promotions to fill vacancies in the bargaining unit. Agreement, the District may, beginning in Year Two, continue to calculate teacher salaries using the base salary values described in the Agreement for Year. And. THE GREYSTONE FEDERATION OF TEACHERS. Collective Bargaining Agreement between the Hanover Teachers Association and the Hanover School Committee. The provisions of this contract will be incorporated in the individual and continuing contracts of the teachers. Support the National Center's mission of studying collective bargaining and labor relations at colleges and universities.