union power

Gutting Wisconsin teachers unions hurt students, study finds

PHOTO: Creative Commons / Michael Vadon
Wisconsin Gov. Scott Walker in 2015.

The high-profile fight to limit union power was replete with drama — including a recall election and state legislators fleeing to neighboring states.

In the 2011 battle in Wisconsin, Republican Gov. Scott Walker ultimately came out the victor. The controversial law passed, Walker won the recall, and the Democratic-aligned unions have lost much of their power.

But new research points to other losers in the fight: students in the state’s already struggling schools.

The first study to assess how Wisconsin’s high-profile weakening of unions, particularly teachers unions, affected students finds that it led to a substantial decline in test scores.

The findings come as the U.S. Supreme Court is set to hear arguments for a case, known as Janus, that could dramatically scale back union power across the country — essentially taking aspects of the Wisconsin model national. And they give credence to concerns from unions and their defenders that weakening teachers bargaining power would ultimately make schools worse, not better.

A report from the left-leaning Center for American Progress released Wednesday highlights this research — and the fact that teacher pay and average experience declined in the wake of the law, known as Act 10 — to argue that weakening unions ultimately harm schools.

“Those concerned about the quality of public education — and of all public services — should understand that Wisconsin’s Act 10 and associated budget cuts have not had the positive impact on education that its proponents claimed it would,” the CAP report argues.

Still, the research, which has not been formally peer-reviewed, only assesses the short-term impact of Wisconsin’s law. It adds to a complicated set of research findings on unions that doesn’t render a clear verdict.

Short-term effect in Wisconsin is negative, especially for low-achieving schools

The new research looks at the effects of Wisconsin Act 10, which became law in 2011 and severely limited the scope of collective bargaining and allowed members to opt out of unions.

The paper’s author, Jason Baron, took advantage of what was essentially a natural experiment set up by the law. Act 10 did not affect all school districts at once — a handful of school districts were allowed to maintain union rules until their existing contract expired up to two years later. That helped isolate the immediate impact of the law.

Baron found that weakening unions led to declines in test scores, particularly in math and science. The effects were fairly large, comparable to sharply increasing class sizes. And the harm was not evenly distributed: Schools that started out furthest behind were hurt the most, while higher achieving schools saw no impact.

Other research may help explain why.

The law led to big cuts in teacher compensation, particularly for veteran teachers and especially in health insurance and retirement benefits, according to one paper. There was also a spike in teacher retirement immediately following the law’s passage.

As compensation drops, it may become harder for district and teachers to recruit and keep teachers. An increase in retirement also reduces teacher experience, which has been linked to effectiveness.

Another study found that some Wisconsin districts moved from a single salary schedule to a performance-based pay system after Act 10’s passage. Those performance pay systems were more likely to be adopted by higher-achieving districts, potentially allowing them to lure effective teachers away from struggling schools.

“Following Act 10, high-performing schools filled vacancies from teacher retirements by poaching high-quality teachers from low-performing schools through attractive compensation schemes,” the paper concludes. So while those retirements might have hit all districts equally, high-performing districts were better able to make up the difference — at the expense of low-performing schools.

There is one study that complicates the narrative in Wisconsin. As retirements spiked, it found that academic achievement actually increased in the grades that teachers left. It’s not clear what explains this.

The larger question of how teachers unions affect learning remains up for debate

A number of other recent studies have examined the relationship between teachers unions and student outcomes outside of Wisconsin. The results aren’t consistent, but the trend has been more positive for unions of late. A caveat: Some of these studies have not been published in peer-reviewed academic journals.

  • On recent efforts to weaken unions: Research in Tennessee found that it led to a drop in teacher pay, but had no effect on student test scores. But a study of four states, including Wisconsin, that recently weakened unions found evidence of reduced teacher quality as a result.
  • On what happens when charter schools unionize: Two studies in California came to differing conclusions. One found that when charters unionize, student test scores go up, but the other showed no impact.
  • On the initial rise of collective bargaining: Another paper finds that students who went to schools where districts negotiated with unions earned less money and were more likely to be unemployed as adults. But this study looks at a fairly old data set — examining those who attended schools between 1965 and 1992.

Meanwhile, it’s not clear if any of this research is likely to influence the Supreme Court, as it considers the Janus case that could make life more difficult for unions. Last month, Chief Justice John Roberts called empirical studies on political gerrymandering “sociological gobbledygook.”

state test results

With accelerated growth in literacy and math, Denver students close in on state averages

Angel Trigueros-Martinez pokes his head from the back of the line as students wait to enter the building on the first day of school at McGlone Academy on Wednesday. (Photo by AAron Ontiveroz/The Denver Post)

Denver elementary and middle school students continued a recent streak of high academic growth this year on state literacy and math tests, results released Thursday show. That growth inched the district’s scores even closer to statewide averages, turning what was once a wide chasm into a narrow gap of 2 percentage points in math and 3 in literacy.

Still, fewer than half of Denver students in grades three through eight met state expectations in literacy, and only about a third met them in math.

Find your school’s test scores
Look up your elementary or middle school’s test scores in Chalkbeat’s database here. Look up your high school’s test results here.

Denver’s high schoolers lagged in academic growth, especially ninth-graders who took the PSAT for the first time. Their test scores were lower than statewide averages.

“We are absolutely concerned about that,” Superintendent Tom Boasberg said Thursday of the ninth-grade scores, “and that is data we need to dig in on and understand.”

Students across Colorado took standardized literacy and math tests this past spring. Third- through eighth-graders took the Colorado Measures of Academic Success, or CMAS, tests, which are also known as the PARCC tests. High school students took college entrance exams: Ninth- and 10th-graders took the PSAT, a preparatory test, and 11th-graders took the SAT.

On CMAS, 42 percent of Denver students in grades three through eight met or exceeded state expectations in literacy. Statewide, 45 percent of students did. In math, 32 percent of Denver students met expectations, compared with 34 percent statewide.

While Denver’s overall performance improved in both subjects, third-grade literacy scores were flat. That’s noteworthy because the district has invested heavily in early literacy training for teachers and has seen progress on tests taken by students in kindergarten through third grade. That wasn’t reflected on the third-grade CMAS test, though Boasberg said he’s hopeful it will be as more students meant to benefit from the training take that test.

On the PSAT tests, Denver ninth-graders earned a mean score of 860, which was below the statewide mean score of 902. The mean PSAT score for Denver 10th-graders was 912, compared with the statewide mean score of 944. And on the SAT, Denver 11th-graders had a mean score of 975. Statewide, the mean score for 11th-graders was 1014.

White students in Denver continued to score higher, and make more academic progress year to year, than black and Hispanic students. The same was true for students from high- and middle-income families compared with students from low-income families.

For example, 69 percent of Denver students from high- and middle-income families met expectations on the CMAS literacy tests, compared with just 27 percent of students from low-income families – which equates to a 42 percentage-point gap. That especially matters in Denver because two-thirds of the district’s 92,600 students are from low-income families.

Boasberg acknowledged those gaps, and said it is the district’s core mission to close them. But he also pointed out that Denver’s students of color and those from low-income families show more academic growth than their peers statewide. That means they’re making faster progress and are more likely to reach or surpass grade-level in reading, writing, and math.

Denver Public Schools pays a lot of attention to annual academic growth, as measured by a state calculation known as a “median growth percentile.”

The calculation assigns students a score from 1 to 99 that reflects how much they improved compared with other students with similar score histories. A score of 99 means a student did better on the test than 99 percent of students who scored similarly to him the year before.

Students who score above 50 are considered to have made more than a year’s worth of academic progress in a year’s time, whereas students who score below 50 are considered to have made less than a year’s worth of progress.

The state also calculates overall growth scores for districts and schools. Denver Public Schools earned a growth score of 55 on the CMAS literacy tests and 54 on the CMAS math tests. Combined, those scores were the highest among Colorado’s 12 largest districts.

Other bright spots in the district’s data: Denver’s students learning English as a second language – who make up more than a third of the population – continued to outpace statewide averages in achievement. For example, 29 percent of Denver’s English language learners met expectations in literacy, while only 22 percent statewide did, according to the district.

Denver eighth-graders also surpassed statewide averages in literacy for the first time this year: 45 percent met or exceeded expectations, as opposed to 44 percent statewide. That increase is reflected in the high growth scores for Denver eighth-graders: 52 in math and 57 in literacy.

Those contrast sharply with the ninth-grade growth scores: 47 in math and an especially low 37 in literacy. That same group of students had higher growth scores last year, Boasberg said; why their progress dropped so precipitously is part of what district officials hope to figure out.

Trending up

Most schools in Tennessee’s largest district show growth on state test

PHOTO: Laura Faith Kebede
Students at Freedom Preparatory Academy's high school prepare to take their TNReady geometry test.

Most schools in Shelby County Schools showed progress in all subjects except science, but students still outshined their peers across the state in science, earning them the state’s highest rating in growth.

About half of schools in the Memphis district saw a bump in English scores, also earning the district the highest rating of growth under the Tennessee Value-Added Assessment System, known as TVAAS.

Superintendent Dorsey Hopson attributed the gains to a renewed focus in preschool education in recent years, adding a reading curriculum more aligned with state standards, and doubling down on literacy training for teachers and students.

“When you think about the investments that we’ve been able to make in schools over the last two years, I think the data is showing that we’re seeing a good return on our investment,” he told reporters Thursday.

But the scores don’t come without tension. Hopson recently teamed up with Shawn Joseph, the director of Metro Nashville Public Schools, to declare “no confidence” in the state’s test delivery system, which has been plagued with online problems since it began in 2016. Still, Hopson said educators are utilizing the data available to adjust strategies.

“It’s an imperfect measure, but it’s the measure we have right now,” he said. Hopson worries the failures of the state’s online testing system used by high schoolers made “some teachers and students lose focus.”

“There’s impact on those kids that we may never know about,” he said.

Find your school and compare here

The state doesn’t release data for an exam if fewer than 5 percent of students performed on grade level or if 95 percent of students were above grade level. An asterisk signifies that a school’s score falls in one of those two categories.

Editor’s note: The tool to look up school test scores has been updated to clarify scores per grade level. For elementary and middle schools, the scores indicate the percent of students in grades 3-8 who performed at grade level. For high schools, the scores indicate the percent of students in grades 9-12 who performed at grade level. If a school has students in both categories, we’ve listed how students performed both in grades up to 8th grade and high school levels.

 

District-wide results released in July show that more young students are reading on grade-level, and that math scores went up across the board. But the percentage of high school students who scored proficient in reading dropped by 4 percentage points. Shelby County Schools still lags significantly behind the state average.

Shelby County Schools also improved its overall growth score, which measures how students performed compared to peers across the state who scored similarly to them the year before. It increased from 1 to 2 on a scale of 5. More than half of schools scored 3 or above, meaning those students scored on par or more than their peers.

The district’s nearly 200 schools include about 50 charter schools that are managed by nonprofit organizations but receive public funding. The rest are run by the district.

Below are charts showing the five schools that performed best and worst in the district in each subject, as well as those that grew or declined the most in each subject.

The state doesn’t release data for an exam if fewer than 5 percent of students were on grade level or if 95 percent of students were above grade level. The charts below only include schools that fall in between that range.

English Language Arts

Graphic by Samuel Park
Graphic by Samuel Park
Graphic by Samuel Park
Graphic by Samuel Park

Math

Graphic by Samuel Park
Graphic by Samuel Park
Graphic by Samuel Park
Graphic by Samuel Park

Science

Graphic by Samuel Park
Graphic by Samuel Park
Graphic by Samuel Park

Graphic by Samuel Park

Social Studies

Graphic by Samuel Park
Graphic by Samuel Park
Graphic by Samuel Park
Graphic by Samuel Park