About 60,000 teachers launched an indefinite strike across Lebanon to press demands for higher wages, shutting down schools for about 600,000 pupils, education officials said. The strike closed about 2,250 state and private schools. The teachers demanded pay reviews every three months as well as improved medical and travel benefits. Earlier this month, the government doubled the minimum wage, retroactive to July 1, taking the basic minimum from $11.30 a month to $22. Most teachers receive salaries at about the minimum level.