Email Print

May Day 2016

by ctu communications  |  April 29, 2016


Stop ignoring proposals for financial transactions tax

by Robert Reich  |  April 28, 2016

Why is there so little discussion about one of Bernie Sanders’ most important proposals – to tax financial speculation?

Buying and selling stocks and bonds in order to beat others who are buying and selling stocks and bonds is a giant zero-sum game that wastes countless resources, uses up the talents of some of the nation’s best and brightest, and subjects financial market to unnecessary risk.

High-speed traders who employ advanced technologies in order to get information a millisecond before other traders get it don’t make financial markets more efficient. They make them more vulnerable to debacles like the “Flash Crash” of May 2010.

Wall Street insiders who trade on confidential information unavailable to small investors don’t improve the productivity of financial markets. They just rig the game for themselves.

Bankers who trade in ever more complex derivatives – making bets on bets – don’t add real value. They only make the system more vulnerable to big losses, as occurred in the financial crisis of 2008.

All of which makes Bernie Sanders’ proposal for a speculation tax right on the mark.

Please click here to continue reading at

CTU testifies on education funding before Illinois House Education Task Force

by ctu communications  |  April 26, 2016

CHICAGO—Chicago Teachers Union (CTU) political and research staff testified today before the Illinois House of Representatives’ Education Task Force on the financial state of Chicago Public Schools (CPS). The task force, chaired by Rep. Barbara Flynn Currie, was created to explore the re-formulation of the school funding formula for the state of Illinois.

In testimony today, the CTU maintained its position that CPS has a revenue problem stemming from 20-year-old school reform law that continues to reverberate throughout the district in the form of pension underfunding, outsourcing and massive debt. CPS’s largest cost drivers—debt service, pensions, charter expansion—have created the current crisis, as debt must be repaid, pensions payments must be met due to constitutional obligations, and charter schools are opened and then closed to drive down costs.

Due to the number of low-income families served and the socio-economic makeup of Chicago’s neighborhoods and communities, CPS requires more funding to educate effectively. CPS students need lower class sizes, grief counseling, full curriculum, librarians, counselors and clinicians. Other Illinois school districts have access to these resources in abundance, even when the students have additional resources at home.

Without access to full local revenue through tax increment financing and the Property Tax Extension Limitation Law, CPS—and by extension, CPS teachers and education support staff—cannot educate effectively. Funding for Chicago’s public schools continues to lag behind other districts such as those in New York City and Washington, D.C., which spend nearly $20,000 per student, with much better in-school supports and pre-kindergarten and early childhood education.

The CTU remains committed to tax proposals such as a millionaires tax, graduated income tax, financial transaction tax and the closing of corporate loopholes. Only 2 percent of the Illinois economy needs to be shifted to make plans for increased funding work across the state.‎

“Nearly all income gains that have been made since the recession ended have gone to the top 1 percent, which means there’s already been a shift in our economy away from benefitting working families and the middle class,” said CTU President Karen Lewis. “Fully funded schools is one way to help shift it back.”

ISBE licensure information

by walter taylor - ctu professional development facilitator  |  April 26, 2016

The CTU Quest Center advises that you always enter your PD hours into ELIS immediately after you complete the professional development activity and evaluation. If you wait, you may forget, and your PD hours may end up not counting toward your license renewal. 

For help entering or submitting PD Hours into ELIS go to

Please note that entering your PD Hours into Learning Hub on CPS is NOT the same as entering it into ELIS on the ISBE website. The PD hours you enter in Learning Hub DO NOT transfer to ELIS. You MUST enter your PD hours into ELIS yourself, as soon as possible.

If you have not yet earned your required hours for this licensure cycle you can still take and complete PD now through mid-June. To earn your remaining required ISBE PD hours aligned to REACH please take advantage of the Chicago Teachers Union Quest Center professional development offerings which can be found at

If you have not yet set up your ELIS account on ISBE, go to to learn more about how to do so.  If you have not done so already, please set up your ELIS account immediately.

For further information on how to renew your PEL at the end of your five-year licensure cycle you may find instructions at

If you would like to learn more about ISBE licensure requirements go to

If you need further information or assistance AFTER you have visited these very helpful ISBE sites please contact:

Walter Taylor, NBCT,  CTU Quest Center Professional Development Facilitator, at 312-329-6273 or

Time is of the essence!

Jacobin: The Chicago School

by Rick Perlstein  |  April 25, 2016

This past September, an award-winning Chicago Public Schools principal named Troy LaRaviere published a post on his blog that began, “Whenever I try to take a break from writing about CPS to focus on other aspects of my professional and personal life, CPS officials do something so profoundly unethical, incompetent and/or corrupt that my conscience calls me to pick up the pen once more.”

What had Principal LaRaviere going this time? We’ll get there eventually. But first we have to back up and survey what brought the Chicago Public Schools to this calamitous pass in the first place. It’s hard to know where to begin. Though when it comes to the failings of America’s institutions you can rarely go wrong by looking to the plutocrats.

Travel back with me, then, to July of 2003, when the Education Committee of the Civic Committee of the Commercial Club of Chicago — comprised of the chairman of the board of McDonald’s, the CEOs of Exelon Energy and the Chicago Board Options Exchange, two top executives of the same Fortune 500 manufacturing firm, two partners at top international corporate law firms, one founder of an investment bank, one of a mutual fund, and the CEO of a $220.1 billion asset-management fund: twelve men, all but one of them white — published “Left Behind: Student Achievement in Chicago’s Public Schools.”

Chicago’s schools were in pathetic shape, these captains of industry explained: only 36 percent of eleventh graders met or exceeded state reading standards, only 26 percent reached math standards, only 22 percent were up to snuff in science, and 40 percent had by then dropped out.

They found hope, however, in a new kind of educational institution called a “charter school” — “publicly-funded but independent, innovative schools that operate with greater flexibility and give parents whose children attend failing schools an option they do not have.”

Please click here to continue reading at

IFT Response to Passage of Stopgap Higher Education Funding Bill

by dan montgomery - ift president  |  April 22, 2016

WESTMONT—Following passage of Senate Bill 2059, Illinois Federation of Teachers President Dan Montgomery released this statement:

"While this bill is not a long-term budget solution, it is a critical stopgap measure that will prevent immediate college closures, help our students plan for their future, and begin to address the crisis Governor Rauner created. For almost a year, the Governor has made unreasonable political demands a condition of passing a state budget and vetoed funding for higher education and students in need. We urge Governor Rauner to sign the bill into law and then refocus his priorities. It’s time to fully fund education. It’s time to fully fund social services. And it’s time to pass a full and sufficient budget for the current and upcoming fiscal years." 

The Illinois Federation of Teachers represents 103,000 teachers and paraprofessionals in PreK-12 school districts throughout Illinois, faculty and staff at Illinois’ community colleges and universities, public employees under every statewide elected constitutional officer, and retirees.

President Karen Lewis at City Club of Chicago

by karen lewis - ctu president  |  April 20, 2016

Good afternoon. It is always a pleasure to stand before the City Club of Chicago to share in the ideas and visioning for our city. I want to thank Jay Doherty, as always, for the invitation and I look forward to our exchange at the end of my remarks, which I will keep brief so we can have time for a meaningful question and answer period.

Let us cut to the chase.

Is the City of Chicago headed toward another teachers’ strike? Yes. Should this happen, it will be the third one since 2012. We have 26 more days of “cooling off” as required by state law, and then our members will decide whether the CTU will deliver a 10-day notice of our intent to strike.

No decision has been made, and I will tell you all as I have told the press a number of times—I am not going to give out strategy. We will not hand over our playbook to CPS and their broke on purpose bureaucrats. They have their strategy and we have ours—theirs will cripple the teaching force, ours will protect it and the students we serve.

Neither side has a crystal ball. While contract negotiations have not yielded the results we want, we remain at the table. We cannot rule out a strike.

I know some of you are saying—especially the people on the Tribune’s editorial board—that the CTU should just roll over and accept the contract being offered to our members. Again, teachers, paraprofessionals and clinicians elected me and three others to office to carry out their wishes in collective bargaining, not to be authoritarian dictators who tell them who’s who and what is what. We have a deal when they say we have a deal.

As brilliantly stated by our fact-finding panel member, Atty. Robert Bloch:

“The Neutral Fact Finder’s report (was) dead on arrival…. The reality is that the Chicago Board of Education cannot afford to sign a contract with the Chicago Teachers Union. CPS finances have surpassed the danger zone and are now (nearing) a meltdown. We need revenue solutions to finance public education, not more cuts to the system, which has already been cut well past the bone and now threatens the vital organs.”

The recommended contract proposal, which CPS now tells us it can no longer afford, actually reduces teacher and PRSP take-home pay over the four-year period of the contract. It offered no solution to ballooning class sizes. Even with the positive non-economic elements to the contract designed to enhance instruction and the academic environment for students, the CTU cannot ignore the devastating economic impact this contract would have on our members.

Cutting educator compensation is not the answer to CPS’s extreme financial problems. The district desperately needs stable, sustainable and increasing revenue to finance its operations. Without it, the mayor’s handpicked Board of Education cannot afford any contract proposal, even its own.

What then is the answer?

Sustainable revenue. Long-term revenue. Otherwise, we will be in the same position year after year after year.

Today, a group of our members is in Springfield lobbying for revenue solutions. CPS stays on its strange message about “joining them in Springfield,” but for what purpose? We are not going hand-in-hand with them to cut our own throats.

CPS claims a deficit of $1.1 billion for next year, although they have recently said they have already found ways to reduce this budget deficit by $335 million. However, those reductions come at a great cost to our members and the schools. About $120 million of that amount is from keeping in place the February cuts to school budgets for all of next year. Another $130 million comes from eliminating the CTU pension pick-up, which is the result of a 7 percent pay cut for our members. So full funding for CPS means that we still need to close the full budget deficit of $1 billion. But to get us to have on-par per-pupil funding for the classroom ($20,000) as some of the richest districts in the state (Winnetka, or Rondout) we are talking about getting thousands more per pupil and we need billions more in annual revenue for the schools Chicago’s students deserve.

The CTU has been clear on its revenue positions: tax the rich, reign in the banks and close the budget gap. Structural solutions require progressive income tax. We are also looking at a way to tax the billions traded on the Chicago Board of Trade, which currently is at no tax, and as I have said before, closing corporate loopholes.


Mr. Claypool and the rest of his team should repurpose the district’s administrative direction and actually get back to managing the business of the district. They have spent hundreds of millions of dollars outsourcing management functions. Just recently, we have learned that CPS intends to phase out unionized building engineers—people who provide a critical function in our buildings. We have seen what has happened with Aramark—dirty school buildings, rodents and overall filth making the teaching and learning environments unsafe.

It has been six months after the first of three carbon monoxide poisoning incidents in CPS buildings, and the Chicago Teachers Union has yet to be provided full reports of the poisoning of educators, students and other school personnel. The three incidents of carbon monoxide poisoning the Union is investigating are at Prussing Elementary School (10/30/15), Shields Elementary School (11/20/15) and Mann Elementary School (12/3/15). Hundreds of students and staff were poisoned and evacuated from these schools. We are demanding answers and we implore CPS to honor our FOIA requests on the matter. How does this happen in a 21st century school system?

At the June 2015 Chicago Board of Education meeting, CPS voted unanimously to approve a $30 million, four-year contract with RCM Technologies for supplemental nursing services, professional development and scheduling. Nine months after the RCM contract was signed—a contract that was promoted as a cost-savings move—nurses throughout the district are reporting shocking stories of untrained, contracted nurses who cannot perform basic tasks like operating an epinephrine injection (EpiPen®).

And need I remind you of the embarrassing SUPES scandal that will send one handpicked CPS CEO to prison?

This is why there is rampant distrust of Chicago Public Schools.


Gross mismanagement, the closing of schools, the starving of school budgets, the disruption of education services, the dismantling of special education programs, the revolving door at Central Office, and the removal of beloved teachers, coaches and school employees who have made meaningful differences in the lives of so many is the rule of the day. How does this provide our students with a high-quality, world-class education?

We see this as an assault on public education. We see this as an assault on public school teachers and we know this is an assault on our students’ futures.

Why are they doing all of the school-based experiments that will ultimately lead to a decline in the educational product in Chicago? All of these amount to a war on Chicago’s youth because education is a lifeline out of poverty, and away from neighborhood violence and marginalization. Our schools are places where dreams become realized—places where our students are inspired to not only change their lives, but to enhance the lives of others and improve the world we live in. Let’s look at this war on our youth:

In terms of youth poverty: More than 1.3 million children in the Chicago metro area are in poverty—meaning 14 percent or 1-in-5 children in Chicago—89 percent of whom we teach in our schools. In addition, they are not invisible. One-in-five residents in deep poverty live in the neighborhoods of Burnside, Riverdale, Englewood, East Garfield Park, North Lawndale, Washington Park and West Garfield Park.

In terms of youth criminalization: According to the Chicago Youth Justice Data Project, Black youth are 37 percent of the population but 79 percent of arrests. Latino youth are 40 percent of the population and 18 percent of arrests.

In terms of homeless children, during the 2013-2014 school year, 22,144 students in CPS were classified as homeless (according to the Chicago Coalition for the Homeless). They were 84.4 percent African-American, 12.2 percent Latino, 1.6 percent white and 1.6 percent from other ethnicities. It was also noted that of the 4,369 homeless students who were also identified with a disability, appropriate supports were more difficult to obtain.

In terms of children in state custody or care: In Illinois, the percentage of wards that spend more than two years in state custody is nearly twice as high as in other states. Despite its problems and perceptions in communities of color, the Department of Children and Family Services can be a lifeline for children in crisis. The budget appropriations for this critical agency:

  • FY15 appropriation was $1,165,961.80
  • FY16 appropriation is $10,511.60 (TEN THOUSAND DOLLARS!)
  • This is a difference of NEGATIVE 99%

What is going on here? This is not just statistical fodder—these numbers represent real people, real lives. We give tax breaks to the wealthy and give banks a pass, yet cut budgets that help poor, troubled children to bare bones? And you wonder why young people are angry and vocal about the political hypocrisy going on?


“If a man tells you he loves America, yet hates labor, he is a liar! There is no America without labor, and to fleece the one is to rob the other,” said Abraham Lincoln.

I say today, that if Governor Rauner says he loves Illinois, yet he hates labor, he is a liar! There is no Illinois without labor, and to fleece the one is to rob the other.

Bruce Rauner is a liar. You know, I’ve been reading in the news lately about all of these ISIS recruits popping up all over the place—has Homeland Security checked this man out yet? Because the things he’s doing look like acts of terror on poor and working class people.

People are hurting across Illinois while this so-called governor plays chicken with the state budget. He has launched a personal crusade against the CTU and every other labor organization in our state. Rauner understands that strong labor means those who toil in these systems should reap their fair share of the wealth, stability and progress they helped produce.

The governor’s vicious attacks on the CTU, and District 299, quite frankly, is a purposeful distraction to redirect our attention from his inability to govern and manage this state’s finances. In addition, his holy war does not stop there—he is destroying the lives of the disabled, college students, the elderly, the poor, the displaced and the dispossessed.

His “turn us down” agenda is not just being felt in Chicago, but throughout the state. The East Side Health District facility in East St. Louis will have to close its family case management unit by the end of the week, affecting new mothers and their infants. Organizations that provide meals to seniors that are food insecure, of which 60 percent are women, are offering scaled down services or none at all. Meals on Wheels, a provider to those seniors, and others with disabilities, has had to close some locations that stopped receiving funding in July—all of this at a time when 1-in-6 people in Cook County face food instability.


I am generalizing here, but I find it amazing when I talk to people who assume that just because someone is wealthy, this person is somehow smarter than the rest of us. Intellect may have nothing to do with one’s ability to obtain capital, because if that were the cause, all of the fine people at Chicago Public Schools would have figured it out by now.

Rauner lacks the ability to govern. He purchased his seat, conned the people of Illinois and is clueless on how to “turn around” Illinois to better serve its citizens. And, as a slap in the face, he even said he would take no salary. Therefore, what is the governor’s seat about? It is about power—plain and simple.

Despite his constant attacks on the Chicago Teachers Union, he had no problem clouting his daughter into Walter Payton High School, where CTU members work. We find it so ironic that Mr. Rauner blames CPS teachers for failing students, yet chooses to send his daughter to a city school instead of New Trier, one of the most highly funded schools in the state and the nation. With nine houses, who knows where he and his children actually lived when he clouted his daughter into the school. According to 2014 stats of out-of-district tuition rates of $11,707, the governor owes the school district $46,828. Maybe we ought to call the governor and ask him to pay his fair share.

This so-called governor clouts his child into one of our high schools, but then has the audacity to deny about 130,000 college students MAP grants to assist them in their higher education. He is threatening to close Chicago State, a predominantly African-American university that will reportedly graduate three physicists this school year. It should also be noted:

  • More than half (58 percent) of MAP recipients are so low-income that the federal government does not consider them able to contribute any resources to pay for college. In FY2014, the average family income of a dependent (“traditional”) MAP recipient was $30,000 per year, and the average income of an independent (“non-traditional”) MAP recipient was $16,000 per year.
  • Of the undergraduates at Illinois public universities who identify themselves as Black or Hispanic, more than half receive a MAP grant.
  • Despite their financial challenges, MAP recipients graduate from college at about the same rate as their peers at the same institutions. 
  • MAP recipients are enrolled in all sectors of higher education, with the largest percentage of students in the community college sector.

So while Rauner is busy blocking teens and young adults from pursuing higher education, on the local level he and his allies, such as Mayor Emanuel and billionaire quasi-school consultant Ken Griffin, are destroying K-thru-12 education in Chicago. Do you see a pattern here?

To quote Giroux:

“The greatest threat to our children does not come from lowered educational standards, the absence of privatized choice schemes, or the lack of rigid testing measures. On the contrary, it comes from a society that refuses to view children as a social investment, one that consigns 16.3 million children to live in poverty, reduces critical learning to massive testing programs, promotes policies that eliminate most crucial health and public services, and defines masculinity through the degrading celebration of a gun culture, extreme sports, and the spectacles of violence that permeate corporate-controlled media industries.”

We have a crisis of values in our city and in Illinois.

We need to change the conversation.

Someone asked me, “Karen Lewis, what will you tell parents, if the teachers go on strike?”

I tell them to join us in the movement to protect our students (their children) and the future of public education. Join us in the fight against this austerity agenda that targets the young and old, and those considered weak, powerless and voiceless. Teachers, paraprofessionals and clinicians are not the problem. We have families. We pay taxes. We live under extreme economic conditions that call on us to continue to give up more and more in a ham and egg justice scenario. We drop the ham (which means a whole leg) and CPS gives up an egg and keeps on moving.

I want parents to know that their children are not pawns or points on the board. If adults do not fight for their futures, who will? They will only inherit the mess we leave behind.

Fighting is not easy. It is not pretty. Feelings get hurt and lines are drawn. People will ask, “Whose side are you on?” If you say you’re on the freedom side, then that means you will join us in asking the rich to pay their fair share; calling on the city and state to stop the attacks on public and higher education; in asking the banks to end their predatory deals that strip vital dollars from our schools; in fighting for stronger neighborhoods and job creation, and access to health care and not just health insurance.

These are not ideals. This is a necessary framework for public policy and democracy if we are to have a just school system and a just Chicago.

Thank you.

CTU responds to binding arbitration request

by ctu communications  |  April 20, 2016

CHICAGO—Today, Chicago Teachers Union spokeswoman Stephanie Gadlin released the following statement in response to a CPS request for binding arbitration:

"This so-called request for arbitration is a CPS publicity stunt before President Lewis’ City Club speech today at noon. We have hundreds of members in Springfield right now fighting for progressive revenue and an end to the budget stalemate. While Karen is delivering her speech at noon, our members will be marching on the governor’s mansion in Springfield. CTU does not have binding interest arbitration because we choose to negotiate and write our own contracts---plus police and fire, as he referenced, cannot strike. We can’t say we’re interested in this until we know the rules of arbitration and under what terms. Binding arbitration puts our fate in the hand of a single person rather than our nearly 30,000 rank and file members."

Solidarity with striking NTFC Local 6546

by randi weingarten - american federation of teachers president  |  April 19, 2016

What if you had to reapply for your own job every year, and you didn’t know until May whether you’d be employed in August?

That’s exactly the situation facing members in the Non-Tenure Faculty Coalition at the University of Illinois at Urbana-Champaign. And it’s just one of the many ways they’re being disrespected by the administration.  

These dedicated educators have been negotiating with the university since October 2014, but the administration refuses to bargain in good faith—and has now walked away from the table. After nearly 40 bargaining sessions, our members are now on strike, as the university refuses to come back to bargaining.

Stand in solidarity with our brothers and sisters by signing their petition to the university to settle a contract that’s fair for educators and good for students.

Our members are asking for a fair contract that will offer stability and opportunity for educators and students.

The biggest issue is whether nontenure faculty—some of whom have worked at UIUC for decades—will have the stability of knowing they have a job the next year. These dedicated employees work on nine-month contracts and often don’t know at the end of one year whether they’ll be teaching the next.

Nontenure faculty teach nearly 40 percent of all undergraduate courses at UIUC, yet they have no guarantee of stable employment, no vote in department governance and no evaluations to help them measure or improve their teaching. And they haven’t had a raise since 2013.

A fair contract for educators will ensure that students get the guidance, instruction and ongoing support they need and deserve. A stable, well-supported teaching force is good for students, good for educators and good for the university.

Tell UIUC it’s time to sit down in good faith with educators to negotiate a fair contract.

Across the country, contingent faculty are coming together to fight for the working conditions they deserve as professionals, and for the resources and supports their students need to learn and grow.

I hope you’ll take a moment to stand in solidarity with the courageous strikers at UIUC and help reclaim the promise of a high-quality public higher education.

Board of Ed’s Zombie Budget Apocalypse Will Destroy Public Education

by ctu communications  |  April 16, 2016

CHICAGO - Faced with a school system in an economic freefall, an extremist governor fighting to destroy Chicago Public Schools (CPS) and the Illinois educational labor law that has tied his hands, neutral fact finder Steven Bierig today recommended that the parties reconsider an old CPS contract offer that has already been unanimously rejected by the Chicago Teachers Union’s (CTU) bargaining team. This is the same contract offer that even CPS now claims it can no longer afford due to its broke on purpose fiscal policies that have led to zombie budgets decimating public schools. The Union immediately served its Notice of Rejection under Section 12(a-10)(5) of the Educational Labor Relations Act, which means the fact finder’s report is dead letter and the 30-day countdown for a possible strike under Section 13(b)(2.5) begins today.

“The clock has started,” said CTU President Karen Lewis, who also noted the Union will hold a formal press conference Monday with details to be announced later. “CPS has created this fiscal mess and refuses to go after hundreds of millions of dollars in existing  revenue that is already out there. Our wacked out governor isn’t helping. Hand-in-hand, both will wind up hurting our members and our students in the long run. We have no choice but to prepare ourselves for a possible strike.”

The previously-rejected contract proposal made by CPS on January 29 would result in teachers taking home less in earnings at the end of the proposed four-year contract than they earn today; and, educator take home pay would be less on June 30, 2019, than it was on July 1, 2014, when the last CPS raise occurred.  The January 29 proposal also sought to freeze salary steps and lanes, which have been in effect for 50 consecutive years, and eliminate the 7 percent pension pickup, which has been in effect for 35 consecutive years.
Cutting educator compensation is not the answer to CPS’s extreme financial problems.  The district desperately needs stable, sustainable and increasing revenue to finance its operations.  Without it, the mayor’s handpicked Board of Education can’t afford any contract proposal, even its own.  Mr. Bierig noted in his report that CPS now says it cannot afford its own January 29 proposal anymore.  In his dissent to the neutral fact finder's report, Union panel member Atty. Robert Bloch noted that “CPS finances have surpassed the danger zone and are now nearly at meltdown.  We need revenue solutions to finance public education, not more cuts to the system, which has already been cut well past the bone and now threatens the vital organs.” 

The fact finder released his report today, followed immediately by the CTU’s notice of rejection. Under the Educational Labor Act, the 30-day countdown for a possible strike begins, meaning the earliest public school educators could withhold their labor is May 16, about a month before the school year ends.  The Union is not required to strike, but it has the right to strike at the conclusion of this 30-day period, provided it first serves upon CPS a 10-day notice of intent to strike. The Union’s membership has already authorized a strike; and, should one be necessary to secure a fair contract, the CTU House of Delegates will deliberate to set the date of the strike.

Lewis added, “We have to talk to our people. We don’t know if we are going to force the school year to a close now or strike when the next school year begins. Either way, we won’t be held hostage by the Board’s zombie budgets. They need to go after the banks, TIF funds, and other forms of short- and long-term revenue that are sitting right in front of us. If they are serious about helping our students and preserving public education in our city, then they will do everything they can to stabilize our schools---and that does not mean hurting teachers, paraprofessionals and clinicians over and over again.” 


Chicago Teachers Union