Magazine reading promotes reading. Children read more when they see other people reading. Teachers should read for pleasure themselves during sustained silent reading time. Light reading is how many people learn to read. Reading teen romances generally promotes reading.
Children enjoy free voluntary reading.
Teaching grammar has no influence on language growth of typical secondary students. Reading may be the only way to develop literacy skills. Larger school library collections mean higher reading scores. Having a school librarian makes a difference in the amount read. We learn to speak by listening and speaking and practicing.