Comments on: The limits of value-added http://www.joannejacobs.com/2010/04/the-limits-of-value-added/ Thinking and Linking by Joanne Jacobs Fri, 10 Feb 2012 04:51:22 +0000 hourly 1 By: Erin Johnson http://www.joannejacobs.com/2010/04/the-limits-of-value-added/#comment-57624 Erin Johnson Fri, 23 Apr 2010 06:40:55 +0000 http://www.joannejacobs.com/?p=14807#comment-57624 Value added measures of teacher effectiveness are just as bad as the status quo. For a measure to be worth spending money on, it had better be both valid and reliable, something that both the VAMs for teaching nor the current evaluations of schools are. Substituting one horrific measure for another does not make the situation better. Certainly the Board of Testing and Accountability cited grave concerns with RttT using VAMs as their measure of accountablity. http://books.nap.edu/openbook.php?record_id=12780&page=8 "...BOTA has significant concerns that the Department's proposal places too much emphasis on measures of growth in student achievement (1) that have not yet been adequately studied for the purposes of evaluating teachers and principals and (2) that face substantial practical barriers to being successfully deployed in an operational personnel system that is fair, reliable and valid." In plain English: VAMs will not work to reliably evaluate teaching. So why are we wasting this tremendous amount of RttT money in developing these data systems? Value added measures of teacher effectiveness are just as bad as the status quo. For a measure to be worth spending money on, it had better be both valid and reliable, something that both the VAMs for teaching nor the current evaluations of schools are.

Substituting one horrific measure for another does not make the situation better.

Certainly the Board of Testing and Accountability cited grave concerns with RttT using VAMs as their measure of accountablity.

http://books.nap.edu/openbook.php?record_id=12780&page=8

“…BOTA has significant concerns that the Department’s proposal places too much emphasis on measures of growth in student achievement (1) that have not yet been adequately studied for the purposes of evaluating teachers and principals and (2) that face substantial practical barriers to being successfully deployed in an operational personnel system that is fair, reliable and valid.”

In plain English: VAMs will not work to reliably evaluate teaching. So why are we wasting this tremendous amount of RttT money in developing these data systems?

]]> By: uberVU - social comments http://www.joannejacobs.com/2010/04/the-limits-of-value-added/#comment-57623 uberVU - social comments Thu, 22 Apr 2010 18:14:58 +0000 http://www.joannejacobs.com/?p=14807#comment-57623 <strong>Social comments and analytics for this post...</strong> This post was mentioned on Twitter by JoanneLeeJacobs: New blog post: The limits of value-added http://www.joannejacobs.com/2010/04/the-limits-of-value-added/... Social comments and analytics for this post…

This post was mentioned on Twitter by JoanneLeeJacobs: New blog post: The limits of value-added http://www.joannejacobs.com/2010/04/the-limits-of-value-added/...

]]> By: Tweets that mention The limits of value-added « Joanne Jacobs -- Topsy.com http://www.joannejacobs.com/2010/04/the-limits-of-value-added/#comment-57622 Tweets that mention The limits of value-added « Joanne Jacobs -- Topsy.com Thu, 22 Apr 2010 12:39:14 +0000 http://www.joannejacobs.com/?p=14807#comment-57622 [...] This post was mentioned on Twitter by JoanneLeeJacobs. JoanneLeeJacobs said: New blog post: The limits of value-added http://www.joannejacobs.com/2010/04/the-limits-of-value-added/ [...] [...] This post was mentioned on Twitter by JoanneLeeJacobs. JoanneLeeJacobs said: New blog post: The limits of value-added http://www.joannejacobs.com/2010/04/the-limits-of-value-added/ [...]

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