Ho Hum wrote:
The value added (http://www.cgp.upenn.edu/ope_value.html) model seems to be the future. What do you guys thinnk about it? Teachers?
Good in theory. But, like many other measures, based on several flawed principles.
First the good:
1. Not norm-referenced. Kids of low ability, even if they don't "pass," still should show a year's worth of growth.
2. It expects growth similar to a student's previous years in school. This is, obviously, different student to student.
3. In theory, the levels schools and classrooms. All students must show growth. Ok.
The problems:
1. It assumes students develop at a predictable, even rate. Children develop at varying speeds, due to a million factors. For example, a student may show a ton of growth between grades 3 & 4, but then that child's father passes away and the family moves. Will that child show the same amount of growth in 5th grade? Most likely, no. And it will have nothing to do with the teacher.
2. It assumes student academic gains are due solely to that year's teacher. In subjects like English, it takes years to master higher-level thinking required in deep reading, identifying theme, etc. (Yes, these are higher order skills for students in middle school). The skill may be introducted in 6th grade, but the gains not realized until 9th, when it all "clicks." Does this mean the 6th, 7th, and 8th grade teachers did nothing? No. It means the child didn't develop evenly. More like a looonnggg slope and then a peak. Which is normal.
3. It assumes test writers can develop assessments that can delineate - exactly - "one year's growth." What in the world does this mean? You ask a 100 educators, you'll get a 100 different answers. When schools are being evaluated on whether or not a child made a year's worth of growth you had better (a) clearly define what exactly that is, for all subjects in all grades, and (b) design assessments that can discern one grade level achievement from the other. Consistently. IMO, this is impossible, except maaaybe in math. In subjects like social studies, the area of study changes year to year. There is no "cumulative effect". In language arts, the standards are nearly identical between grades 6 and 9. SO what exactly is a year's worth of growth? No one knows.
4. These "value-added" measures only apply to the basics" math, english, science, social studies. This is only a fraction of teachers. How is value added in Art? Band? Gym? (Hey! You made 8 of 10 freethrows this year! You're up from 5 last year!) Of course, with this example, that student would be expect to make 11 of 10 free throws the next. It's ridiculous.
SO overall, it's good in theory. It makes a nice slogan or platform for politicians who espouse "reform" in education. Unfortunately, it's ripe with flaws. As the following writer notes, it's like "measuring height with rubber bands"
http://www.dispatch.com/live/content/editorials/stories/2010/10/09/value-added-measurement-unreliable.html?sid=101