Mayor Setti Warren and city school and library officials are challenging students from preschool through high school to read all summer and earn rewards from local businesses. Warren, Superintendent David Fleishman, and Newton Free Library director Phil McNulty announced the Mayor’s Summer Reading Challenge at a recent event. “This is not just about encouraging kids to read, but to participate as a community in reading this summer,” Warren said. He also encouraged parents to read to their children, and for families to read together. Starting Wednesday and continuing through Sept. 1, students will earn a prize-raffle ticket for each five hours of reading, based on their entries on the program’s online log. In addition, any student who writes five book reviews will earn a gift certificate for a free meal at the Chipotle Mexican Grill on Needham Street. There will be two kick-off events this week in the library’s Druker Auditorium, starting with a registration open house from 2 to 3:30 p.m. Tuesday for children in preschool through Grade 6 that will include refreshments from Whole Foods Market. Teens are invited to sign up for the reading program from 3:30 to 5 p.m. Wednesday, with free ice cream provided by J.P. Licks. Participants can also register online at www.newtonfreelibrary.net, where the total number of reading hours will be tracked, or at the library, 330 Homer St.