Wellesley school administrators have begun the process of drafting a redistricting plan for the town’s seven elementary schools in the face of chronic overcrowding, Superintendent David Lussier announced in a letter sent to parents. The district has created a Redistricting Advisory Committee to develop a plan that would be presented early next year and be implemented next fall, Lussier said. The School Committee voted on Oct. 8 in favor of redistricting. The advisory committee will review enrollment numbers and space needs, as well as guidelines for keeping class sizes under 22 students in kindergarten and first grade, and under 24 in grades 2 through 5. The committee may also explore “grandfathering” children into their current schools, Lussier’s letter said. The committee will also study how to restore art and music classrooms that have been converted into general classrooms to their original uses, as well as have a balanced socioeconomic distribution of students among the schools. For more information, visit the school system’s website, www.wellesley.k12.ma.us. Full story for BostonGlobe.com subscribers.