Michael:
I might have misunderstood Tom's post, but he said that they did nothing
in between the tests, and the students' scores changed (the number below
6th grade was smaller). I think his point was that the testing
instruments are unreliable because the students' scores were changing.
My point is that the reason the students' scores were changing was
possibly not due to an unreliable standardized test, but to the
phenomena of regression to the mean, which occurs even with reliable
assessments.
 
I didn't take his point to be about whether or not the instruction was
working.
 
Thanks,
 
Brant Hayenga
Educational Diagnostician 
Stapleton Elementary/Rio Rancho Middle School
(505) 896-0667 ext. 226 (District Office)
(505) 891-8473 ext. 519 (Stapleton Elementary)
bhayenga at rrps.net
 
 
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