DEXTER – An expulsion hearing on a student is expected to be conducted by SAD 46 directors when they meet at 7 tonight at Dexter Regional High School. The board also will discuss the purchase of a school bus, and are expected to approve two gifts to the district. The gifts are stock worth about $10,000 from Ellen Safford that will be liquidated to establish the Henry and Ellen Safford Scholarship, and $10,000 from the local PTO for the purchase of playground equipment at the Dexter Primary School