In an action brought by senior-teacher plaintiffs after a school district entered into a collective bargaining agreement for a new "compressed" salary schedule which allows teachers to obtain merit increases in salary more quickly, judgment granting mandamus relief to plaintiffs is affirmed where: 1) the implementation of the salary schedule violated the uniformity requirement of Education Code section 45028; 2) no statutory exception to the uniformity requirement applied; and 3) the trial court did not exceed its powers in remedying the violation.