The warrant for next month’s Special Town Meeting includes a proposal to install modular classrooms at Lexington High School, with voters being asked to decide whether to pay for the project by raising taxes, taking out a loan, transferring the funds, or a combination of the options. The warrant does not list a dollar amount for the project, but Town Manager Carl Valente said it is expected to cost approximately $7.2 million. The modular classrooms would temporarily alleviate overcrowding until the town tackles a complete rebuilding of the high school in 2019, according to Valente and a committee report presented to the Board of Selectmen. Another article on the warrant seeks funds for short-term improvements to the former Scottish Rite Masonic headquarters at 39 Marrett Road, which the town bought in March for approximately $11 million with plans to turn it into a community center. The town will close on the sale on Dec. 3. Special Town Meeting will start at 7:30 p.m. Nov. 4 in Cary Memorial Hall, 1605 Massachusetts Ave.