Friday, May 27, 2016

What is this "Effect Size" researchers throw around?

Effect Size Explained


We hear about effect size all the time.  I don't know about you, but I didn't completely understand the numbers.  Eric Jensen's  Poor Students, Rich Teachers (ch 2) explains effect size. Ah-ha!! 

0.00 or less = negative effect
0.00 - 0.20 = Negligible or unclear effects
0.21 - 0.40 = small/moderate effects
0.41 - 0.60 = moderate to strong effects --> 0.50 is 1 years worth of growth
0.61 - 2.00 = extremely positive effects --> 1.00 is 1 is 2 years worth of growth;1.50 is 3 years growth

As you look at strategies that provide effect size take into account that students coming from poverty have academic gaps and usually need more than a years worth of growth.  It can be accomplished if we focus our efforts by using what researchers have found to be the most beneficial tactics.  

USE WHAT IS GOOD -- DITCH WAS IS NOT!
Don't simply keep adding to what you do.  
Take a good look at your overflowing toolbox...
now let it go (singing...) and put in what works.