Law Dean Thomas Geu didn't worry too much in 2014 when the percentage of J.D. graduates at his school who passed the July bar exam on the first try dropped by about 20 percent.

The pass rate at the University of South Dakota, which he'd led since 2011, fluctuated from time to time, so the decrease to 70 percent seemed like a temporary blip that would quickly correct itself.

But Geu realized he had a serious problem on his hands the following year when the first-time South Dakota pass rate dropped another 20 percentage points, landing in the 50s.

He found himself among scores of law deans across the country suddenly grappling with significant drops in bar pass rates, even when he didn't fully understand why they had fallen in the first place. The rate at his school bottomed out on the July 2017 exam, when just 46 percent passed the exam on their first attempt — roughly half the rate from four years earlier.

“From a dean's standpoint, there is no greater tragedy than someone coming to law school — wanting to practice law — and not passing the bar,” he said.

South Dakota is hardly the only law school struggling to bring up its bar pass rates. Many of the country's largest jurisdictions have seen the same thing over the past five years, arguably replacing shrinking enrollment as legal education's single biggest challenge.

Florida's July 2018 pass rate was 67 percent — 16 percentage points lower than 10 years earlier. February rates, traditionally lower than July, were released Monday, dipping to 57 percent overall with a range of 80 percent for Florida International University and to 33 percent for out-of-state students. Individual results coded by applicant file numbers are posted here.

Over time, the Florida rate stood at 71 percent in 2005, climbed as high as 83 percent in 2008 just before the Great Recession took hold and then drooped to 68 percent in 2016. A 2017 recovery to 71 percent was followed by the new low of 67 percent last year.

But the falloff has been national in scope. The average score on the Multistate Bar Exam — the multiple choice portion of the test — sank to a 34-year low on the July 2018 administration, according to the National Conference of Bar Examiners.

In California, the overall pass rate fell from 56 percent in July 2013 to 41 percent last July. Texas' pass rate declined from 81 percent to 65 percent over that time period, while New York's fell from 69 percent to 63 percent. Pennsylvania's July pass rate was 6 percentage points lower.

Law.com analyzed the bar pass rates reported by schools to the American Bar Association between 2013 and 2017 — the 2018 results aren't yet available — and found that 42 out of 203 ABA-accredited law schools saw their pass rate fall anywhere from 10 to 20 percent. Thirty-five schools had pass-rate declines of more than 20 percent in those four years.

While their circumstances vary somewhat, most of those schools with pass-rate declines larger than 20 percent have experienced significant drops in their enrollment and applicants, as well as challenges in helping graduates find legal jobs — making for a toxic stew of challenges.

The cause of the decline is multifaceted, but it's clear that waning demand for a law degree has played a key role. From 2010 to 2016, the national applicant pool shrank 36 percent — in part due to a contraction in the entry-level legal job market and newfound attention on jobless law grads with staggering amounts of student debt. As a result, the falloff in applicants with high LSAT scores was particularly steep.

Because of legal education's declining popularity, schools have needed to reach deeper into their applicant pools to fill out their classes, or they were forced to reduce the number of new students they enrolled. Many campuses employed a combination of both strategies.

The upshot is that incoming law students on the whole had lower LSAT scores and undergraduate grades than their predecessors — a trend that has only begun to reverse. (The number of law school applicants was up 7 percent last fall, marking the first significant increase in eight years.)

A recent study commissioned by the State Bar of California concluded the declining credentials of law students account for up to half of the state's falling pass rates.

But Kellye Testy, president of the Law School Admission Council, said there's much more at play. She suspects the falling pass rates are the results of a combination of factors, the most obvious being the lower credentials of incoming students. The declining quality of public education — meaning an erosion of the reading and writing foundations children develop in elementary and high schools — may also be a contributor, she said.

Moreover, the evolving way that law is taught may explain why today's law graduates are struggling more on the bar exam, said Testy, whose organization develops the LSAT. Professors now put less emphasis on memorizing rules and have backed off on some of the high-pressure tactics — like the Socratic method — that historically dominated the classroom.

“The way we used to teach wasn't as good for caring for the student, but it made sure you could take a closed-book exam,” she said. “You knew the doctrine. It was much more like a bar exam, in some ways. Today, when you go into a classroom, it's all PowerPoint. The teachers give them an outline, the students are on computers. There's a different student approach and a different faculty approach.”

The fact that so many law graduates now take bar preparation courses online rather than in person is another avenue worth examining for a potential correlation to falling pass rates, said Judith Gundersen, president of the National Conference of Bar Examiners.

“You used to have to go to a lecture and show up every day,” she said. “Now so much of it is online. People are wondering whether that's changing how people prepare, because there just isn't that communal aspect where, 'I have to prepare in case I get called on.'”

The single-largest decline among all schools has been at Arizona Summit Law School, which closed its doors in August amid accreditation problems. It posted a 69 percent pass rate in 2013, which plunged to less than 27 percent in 2017.

The correlation between falling pass rates and school closures illustrate just how important bar passage — and graduate employment — are to a law school's viability.

“That's a death spiral for a school, if the students start to not be able to become credentialed in the field,” Testy said.

Law.com's analysis of bar-pass data also showed roughly a quarter of schools had a higher first-time pass rate in 2017 than in 2013, so there are some bright spots.

Geu, at South Dakota, is optimistic his school will be part of that modest upward trend. He's leaving the deanship at the end of the academic year amid promising signs on the bar exam front. The school's in-state first-time bar pass rate rose from 46 percent in 2017 to 82 percent last July — an improvement of 36 percentage points over the previous year.

“I am not going to cry victory in my last year of deanship because we happened to go up in our first-time South Dakota pass rate last year,” Geu said. “But I believe we've turned the corner.”

Data collection and charts by Ben Hancock.