After three tries, Reading decided in a 135-90 vote on Tuesday to join a new school district.
The Windsor Central Modified Union District currently includes Woodstock, Bridgewater, Pomfret, Killington and Plymouth. Barnard voters rejected the plan in March.
In Reading, after the original failed in March, voters went back to the polls again in May. The decision passed at that time, but some residents petitioned the school board for a re-vote.
The unified school district was proposed to comply with Act 46. The plan was to restructure the campuses so Reading and Barnard would become pre-K-4 schools with fifth and sixth graders going to Woodstock, Killington and Prosper Valley schools.