Skip to main content

The idea of linking student achievement to teacher evaluation has been around for quite some time through a variety of titles--merit pay, performance pay, incentive pay, etc.  It's also a concept that gained new traction last week when Secretary of Education Arne Duncan released information about the Race to the Top program that the DoE is using to push for state-level changes that favor charter schools, merit pay, and linking student test scores to teachers.

One of the notions that you often here during these discussions is, "The good teachers have nothing to be afraid of." Let's talk about that for a bit.

Last year, for one of my Master's classes, I dug into testing data I had on hand for the first grade team in my building. These are real numbers and real averages with real kids behind them; the test in question is the Measures of Academic Progress, from the Northwest Evaluation Association.

Teacher A: In the fall, her class had an average score of 162.5 on the MAP. In the spring the class average rose to 184.3, an average gain of 21.8 points.

Teacher B: Her fall average was 164.7; her spring average, 183.85, for an increase of 19.15 points.

Teacher C: 169.05 in the fall, 189.35 in the spring, so an average gain of 20.3 points.

Teacher D: An average score of 155.30 points in the fall and 174.85 in the spring. Her fall-to-spring gain, then, was 19.55 points.

With this data, then, you could argue the case for two different teachers as the "winners" in the group. If you look at the average gain, Teacher A is your champion:

  1. Teacher A: 21.8 points
  1. Teacher C: 20.3 points
  1. Teacher D: 19.55 points
  1. Teacher B: 19.15 points

But, if you look at the overall class average at the end of the year, Teacher C is far and away your winner:

  1. Teacher C: 189.35
  1. Teacher A: 184.3
  1. Teacher B: 183.85
  1. Teacher D: 174.85

If we went strictly by these numbers from this year, then, you can see who your quality teachers are. If you were judging solely by the numbers, you might also think that you have a problem with Teacher D--her class average trails the class average of everybody else by almost 10 points, which on the MAP is very nearly an entire year's worth of growth.

But we have to dig even deeper before making a statement about teacher quality, because here the raw numbers aren't telling the whole story.

In the fall, the average score for this test is 164 points. In the spring, the average score is 178. Knowing that, here's some new data to chew on.

In Teacher A's room in the fall, 10 kids scored in the below average range. In the spring, 6 kids scored below average.

In Teacher B's room, 7 kids were below average in the fall, while 3 were below average in the spring.

In Teacher C's room, 6 kids were below average in the fall, and 3 in the spring.

In Teacher D's room, 16 kids were below average in the fall, and 6 tested below average in the spring.

With this new information, you can make two new arguments. First, Teacher B is your best teacher because she had more of her kids cross the finish line (the goal score, 178) than the other teachers did. You could also argue that Teacher D is your best teacher because she lowered her percentage of kids who were below standard more than any of the other teachers did.

So, who is your Most Valuable Teacher?

Is it Teacher A, who added the most value to her class over the course of the year?
Is it Teacher B, who had more of her kids meet the year-end goal?
Is it Teacher C, whose class scored the highest in the spring?
Is it Teacher D, who turned around more failing kids than any of the others?

"Value" is a homophone; there's the value signified by the numbers, but there's also the values of the school, the district, and the state which have to be superimposed atop any effort to link the data to the teacher. If the incentive pay/merit pay/whatever pay in this case goes to only one of the four teachers, you're making a statement about the value of the work the other three did, and it's a pretty lousy thing to say to the other three who also made progress that their success didn't matter as much.

Similarly, can we countenance a system where every one of these teachers is given the bonus money, indicating that they all did a good job? In the eyes of some reformers I could see that being too close to what we do now, where every teacher is assumed to be a good teacher. If a merit pay system is intended to have winners and losers, and to inspire the "less-capable" teachers to emulate the "better" teachers, can we really have a 4-way tie?

These are the questions that have to be answered going forward.

Originally posted to TheRain on Sun Jul 26, 2009 at 03:36 PM PDT.

Your Email has been sent.
You must add at least one tag to this diary before publishing it.

Add keywords that describe this diary. Separate multiple keywords with commas.
Tagging tips - Search For Tags - Browse For Tags


More Tagging tips:

A tag is a way to search for this diary. If someone is searching for "Barack Obama," is this a diary they'd be trying to find?

Use a person's full name, without any title. Senator Obama may become President Obama, and Michelle Obama might run for office.

If your diary covers an election or elected official, use election tags, which are generally the state abbreviation followed by the office. CA-01 is the first district House seat. CA-Sen covers both senate races. NY-GOV covers the New York governor's race.

Tags do not compound: that is, "education reform" is a completely different tag from "education". A tag like "reform" alone is probably not meaningful.

Consider if one or more of these tags fits your diary: Civil Rights, Community, Congress, Culture, Economy, Education, Elections, Energy, Environment, Health Care, International, Labor, Law, Media, Meta, National Security, Science, Transportation, or White House. If your diary is specific to a state, consider adding the state (California, Texas, etc). Keep in mind, though, that there are many wonderful and important diaries that don't fit in any of these tags. Don't worry if yours doesn't.

You can add a private note to this diary when hotlisting it:
Are you sure you want to remove this diary from your hotlist?
Are you sure you want to remove your recommendation? You can only recommend a diary once, so you will not be able to re-recommend it afterwards.
Rescue this diary, and add a note:
Are you sure you want to remove this diary from Rescue?
Choose where to republish this diary. The diary will be added to the queue for that group. Publish it from the queue to make it appear.

You must be a member of a group to use this feature.

Add a quick update to your diary without changing the diary itself:
Are you sure you want to remove this diary?
(The diary will be removed from the site and returned to your drafts for further editing.)
(The diary will be removed.)
Are you sure you want to save these changes to the published diary?

Comment Preferences

Subscribe or Donate to support Daily Kos.

Click here for the mobile view of the site