CHICAGO (Reuters) - Chicago Public Schools on Monday began notifying nearly 1,500 teachers and support staff who are being fired amid a previously announced, $200 million budget cut and a shift in student enrollment. The announcement came as CPS released its $5.7 billion 2016 budget, which includes a historic $1.1 billion budget deficit driven by rapidly rising pension payments. The layoff notices will affect 479 teachers and 1,012 other staff members, out of more than 41,500 employees, according to the school system. CPS officials said 99 percent of the teacher cuts are due to shifting student enrollment. It expects to...