Competency - Library Literature

For the last WorldCat and ERIC competency I searched for collection development, so I searched for the same this time.
SS1: school librar* (Sub)
AND collection development (kw)
Limit to full text articles - yielded 142 records
I saw some good hits, but there were many about other, irrelevant topics.
SS2: school librar* (kw)
AND collection develop* (kw)
AND elementary or middle (kw)to narrow down results
Limit to full text articles - yielded 16 records, but many were about library instruction, not collection development
SS3: school librar* (sub)
AND collection develop* (ti)
AND elementary or middle (kw)
limit to full text articles - yielded only 3 records, so I tried one last time.
SS4: school librar* (sub)
AND collection develop* (kw)
AND elementary or middle (kw)
Limit to full text - yielded 15 results which were all the same as search 2 minus 1 record. Well, I stopped there because I couldn't think of anything else to search for. I chose a record about a librarian who needed to order quality biographies about African Americans for students to do research reports for Black History Month: