Action Research Week 3

I have finally settled on my action research plan!  How do classroom pullouts affect student performance on standardized tests?  I am curious to see if all the time spent pulling students out of electives to work on classwork or TAKS/STAAR related material really helps improve those student's test scores.  Or, are we just giving students an "out" to not do their work in class or at home because they know they will be pulled to make it up?  I just think we are giving students too many chances nowadays and we are not making the parents accountable for what their children do.  Some schools don't even do homework at all.  Anyhow, my biggest fear is that I will not be able to find enough information to make this plan work.  If anyone has any ideas of where to find articles or books on classroom pullouts, or tutorials during class time, please share.