......A Chicago Teachers Union news release late Saturday said the agreement includes: ◆ Raises of 3 percent, 2 percent and 2 percent over the next three years, with the option to extend the deal to four years “by mutual agreement” with another 3 percent raise. ◆ Preservation of extra “step’’ increases based on experience, with new increases in the three highest steps. ◆ The hiring of 600 additional teachers in art, music, physical education,world languages and other so-called “special’’classes. ◆ The requirement that teachers be allowed to “follow their students” to other schools if the teachers school is subject to...