CHICAGO (CBS) -- The Chicago Teachers Union on Thursday accused Chicago Public Schools officials of purposely slowing down contract negotiations. CPS denied doing any such thing—insisting it is bargaining in good faith.

Martinez said CPS maintained its current proposal of 4% raises for CTU members in the first year and 4-5% raises in the next three years, depending on inflation. According to the email, CTU revised its proposed cost-of-living adjustments from 9% every year of the agreement to 6% the first two years and 5% in the final two years.

The extraordinary power struggle between Chicago Public Schools, the teachers union and Mayor Brandon Johnson continued after school board members attended ongoing teachers contract negotiations for the first time in 12 years.

Chicago Public Schools CEO Pedro Martinez accused school board members of "hijacking" negotiations and trying to intimidate his team.

The immediate future of Chicago Public Schools CEO Pedro Martinez remains unclear after the Chicago Board of Education voted to fire him Friday night. Mayor Brandon Johnson's office has not responded to WGN's request for comment,

Members of the Chicago Teachers Union expressed frustration Thursday after spending the day at the bargaining table with fired CEO Pedro Martinez. CTU President Stacy Davis Gates said there was progress when Martinez wasn’t there.