The town-run pre-school at Canton’s Gridley School may not be held next year as a result of a large number of resignations and low enrollment. Recreation director Janet Maguire told selectmen Tuesday that the program could run at a $20,000 deficit this year if more people do not sign up. Four teachers had resigned, meaning that new ones would have to be hired, and there have only been 12 students enrolled although the capacity is 46. Maguire recommended the program be put under the purview of the School Department rather than the Recreation Department. She added that the town’s playground and recreation commission would support continuing the program if it knew that selectmen would support it financially. After hearing from parents that the school was the best affordable option for some, selectmen decided to see if more people would sign up by this Friday. Parents can enroll by calling 781-821-5030.