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First-year findings from a federal study of 77 middle schools suggest that even intensive, state-of-the-art efforts to boost teachers鈥� skills on the job may not lead to significant gains in student achievement right away.
The which was released this month, is the second major experimental study by the U.S. Department of 91制片厂视频鈥檚 Institute of 91制片厂视频 Sciences to find that a high-quality professional-development program failed to translate into any dramatic improvements in student learning. A of efforts to improve teachers鈥� instructional skills in early reading reached a similar conclusion in 2008.
鈥淲hat accounts for this somewhat consistent pattern of results? We don鈥檛 really know,鈥� said Michael S. Garet, a vice president at the American Institutes for Research. His Washington-based organization conducted both studies with the MDRC research group of New York City. 鈥淚 think what we鈥檙e learning,鈥� Mr. Garet added, 鈥渋s that it鈥檚 challenging to make a big enough difference in teacher knowledge and instructional practice to have an impact on student learning.鈥�
The results are already providing some intellectual ammunition for finding better ways to select and retain effective teachers鈥攁nd shedding those who are ineffective鈥攁s the best way to improve instructional quality in schools.
While intensive professional development spurred teachers to change some of their instructional methods, students did not score significantly higher on tests as a result, a study found.
SOURCE: American Institutes for Research; MDRC
The new study shows that 鈥測ou can鈥檛 change teacher effectiveness very well with the tools that we have, and that you can鈥檛 change ineffective teachers into effective ones,鈥� said Eric A. Hanushek, a senior fellow at the Hoover Institution, based at Stanford University. He is also the president of the IES advisory board, which heard a presentation on the new study鈥檚 findings on April 8.
But other scholars said it is too soon to issue a verdict on the effectiveness of professional development.
鈥淲e know teacher change takes time,鈥� said Hilda Borko, an education professor at Stanford. 鈥淭he general belief is that it takes a while for teachers to take ownership of change and really incorporate change into their instruction.鈥�
In both the reading and the math studies, the aim was to test professional-development efforts that conformed with experts鈥� best advice on how to improve teachers鈥� on-the-job learning. The participating teachers received training, for example, in both their academic subject matter and in 鈥減edagogical content knowledge,鈥� which is what teachers know about how to convey specific curricular concepts to students at particular ages. (鈥淭eaching Mathematics Requires Special Set of Skills,鈥� Oct. 14, 2004.)
And unlike typical, one-shot professional-development programs, the efforts examined spanned months and included summer institutes, follow-up seminars, and, in some cases, in-classroom coaching.
Most Educators Engaged
Begun in 2007 in 12 large and middle-size cities, the $21 million math study offered teachers a total of 68 hours of professional development on hard-to-grasp rational-numbers concepts, such as fractions, ratios, decimals, percent, and proportion. The researchers randomly assigned the schools to either the experimental group or a control group in which teachers got whatever forms of professional development their districts normally offered.
Among the experimental group, schools were also divided between two different professional-development providers鈥擜merica鈥檚 Choice or Pearson Achievement Solutions鈥攊n an attempt to make it less likely that any results were the result of the quality of one particular provider. The training was also aligned with the textbooks that the schools were using, which included a limited number of books representing both traditional and reform-minded approaches to teaching middle school math.
According to the study, the teacher-training sessions were well attended and apparently engaging. Researchers found that teachers in the experimental group got, on average, 55 more hours of professional development than did their counterparts in the control group.
Observers also attended the sessions, taking head counts of how many teachers were paying attention, and concluded that most were engaged most of the time.
By the end of the school year, the researchers found, teachers who participated knew slightly more about rational numbers, overall, than their control-group counterparts, but the effect was not statistically significant. Those slight improvements were most notable on a test of pedagogical content knowledge, where teachers stood a 55 percent chance of getting a question right, compared with a 50 percent chance for their counterparts in the control group. (In comparison, the trainers鈥� chance of answering a question correctly on that test was nearly 93 percent.)
On the plus side, the training did lead to changes in teaching practice. Compared with the control group, the teachers in the experimental group were more likely to try to draw out students鈥� thinking by asking students whether they agreed with a classmate鈥檚 response, or inviting them to share their mathematical strategies.
The changes in practice were not dramatic enough, however, to translate into student-learning gains on the computer-adaptive tests that students took in the spring. The students, most of whom came from schools where more than half of students qualified for federally subsidized school meals, continued to score, on average, at the 19th percentile on the tests, which were developed for the experiment by the Northwest Evaluation Association of Lake Oswego, Ore.
Mr. Garet said the researchers are now analyzing the results from a second year of similarly intensive teacher training in the same schools, which they hope to publish this year.
If those results show learning gains from the training, they might suggest the need for even more sustained professional development.
鈥淵ou might need to have pretty intensive professional development all the time, every year, and then slowly get schools into a culture such that the expectation is that you always keep working on your knowledge,鈥� said Sybilla Beckmann, a math professor at the University of Georgia in Athens and an adviser to the study.
Knowledge Gains
The results from the 2008 reading study were based on two years of data, but just one year of professional development. That study also differed from the new one in that it provided in-class coaching, randomly, to only about half the group to see whether that approach yielded any added benefits for teachers or students. But that did not turn out to be the case.
The reading study also found that, while the skills of the 2nd graders in the study did not improve, there were some measurable gains in teachers鈥� knowledge.
For the middle school math study, Mr. Garet said, the researchers tested possible explanations for why the training had failed to affect student achievement. They ruled out the hypothesis, for instance, that the tests were too hard or too easy for the teachers or their students.
鈥淎s you move away from the study itself,鈥� Mr. Garet added, 鈥渙ne hypothesis worth testing would be to see what would happen if the professional development aligned with what teachers were evaluated on.鈥�
Ms. Borko, who is leading her own study of teacher professional development, said it also would have been instructive if the studies had measured the quality of the instruction teachers were getting.
The two IES studies add to a thin base of research from mostly small studies on the efficacy of professional-development programs for teachers, according to the researchers. But Ms. Borko said the knowledge base is poised to grow, because a number of larger, more rigorous studies now in the works have yet to deliver results.
鈥淚 think in three or four years we鈥檒l have a much better sense of how these findings fit in,鈥� she said.
