Monday, January 24, 2011

Teaching experience matters!

Even as Mayor Bloomberg, Chancellor Cathie Black and Michelle Rhee are arguing for experienced teachers to be laid off regardless of seniority, every single study shows teaching experience matters.

In fact, the only two observable factors that have been found consistently to lead to higher student achievement are class size and teacher experience, so that it's ironic that these same individuals are trying to undermine both.

Generally speaking the corporate reformers argue that only the first few years of experience matter,these charts from a study by Thomas J. Kane , Jonah E. Rockoff , and Douglas O. Staiger reveal that at year five, effectiveness is still increasing  for all categories of teachers --other than uncertified teachers. (see charts to the right.)

Of course, most Teach for America recruits are gone by then, which is why their dotted line vanishes at year three.

Actually, there are many studies that show that teaching experience matters, for 15-20 years – with each year in the profession leading to more student gains, especially in reading.

The importance of experience may be clearer in the teaching profession than any other, as shown in a recent re-analysis of the STAR Tennessee experiment, showing that Kindergarten students had higher achievement and earnings as adults, depending on how long their teachers had been in the profession, with gains for every year up to twenty. 

Another study of low-performing, high poverty schools, shows that years of teaching experience at the 2nd grade level was associated with higher reading achievement, for up to 21 years.

“A teacher who had been teaching at a particular grade level for more than 5 years was positively and significantly associated with increased student achievement (effect size=.27)…grade level experience was sizable compared to race (minority status effect size = -.33) and SES (economically disadvantaged effect size= -.08)….Teachers constantly improved teaching effectiveness until the 21st year and declined beyond that.”

See also this study , showing that for 4th and 5th grade teachers in Florida, "in elementary school reading there may be student achievement returns to as many as 15 years of additional teacher experience."

Here's another study that shows student gains for teacher experience-- again, for up to 20 years. (See charts to the right).

So when people who claim to care about kids advocate for laying off experienced teachers, don't believe them.

Private schools and well-funded public schools don't have to choose between having experienced teachers and smaller classes, and neither should our public schools.


Anonymous said...

Awesome post!!!

Anonymous said...

Statistics do not lie, but Michelle Rhee lies with statistics. And words too. -Yam Johnson

NYC Educator said...

Thanks for this. Actually, what matters to Bloomberg is bottom line, and being able to fire working people for any or no reason whatsoever.

Anonymous said...

Thanks for this excellent piece. Those of us who have been teaching for a while need all the support we can get!

I am sharing this here:!/pages/New-York-City-Teachers-Experience-Matters/114089568615636

Anonymous said...

Thanks to Rick Scott, Jebb Bush and Thrasher...Florida is now part of the Michelle Rhee Package.

Paul Peace said...

It's all about money, folks! Why keep a senior teacher when you can have two newbies for the price of that one. I don't think the public realizes that each school has its own budget that includes the teacher's salaries!
I've been a teacher 25 years in the NYC schools and can't wait to get out...i hope I can leave before things get even crazier. Sad...

Patrick R. Gibbons said...

Actually you've mixed up the research. The research actually shows that teacher skills plateau after 3-5 years on the job and in some cases and some subjects decline between year 10 and 20.

Michelle Rhee et. al, don't want to fire experienced teachers they want to get rid of bad teachers. They don't want seniority from preventing schools from getting rid of bad teachers.

Leonie Haimson said...

Did you look at the charts, Patrick, or read the articles? They show no plateau, and no lessening of results after year 10. Next time, read more carefully!