Selecting for Deselection

Our next assignment is to do a deselection report for one section of non-fiction in our service library.  I'm choosing to do the 500s of non-fiction for a few reasons.  Improving science scores at our school is a huge focus of our school improvement plan and one specific strategy from the plan was to have teachers incorporate more science non-fiction text into their PBLs (Project Based Learning Units).  I felt like it was important for me to choose this section to weed since it was being used by all grades and very frequently throughout the school year.  It is definitely intimidating because of its size (32 pages on my shelf list print-out).  Another reason that I chose to do this section is because our librarian had pulled out a huge amount of books to consider for deselection from this section based solely on the fact that they were not partnered with an AR test.  She pulled these (almost a whole cart-full) at the end of last year but never had a chance to go through them.  I wanted to be able to look through them and see which ones were actually outdated, in bad condition, etc. before they were recommended for deselection from the library.  I didn't think that just because there was no AR test was a good enough reason for taking them out of the collection.