Is the following right? For example, can I use "a" in front of "lack"? Or do I need to use "the" in front of "lack"? Do I need to use "the" in front of "factors"? Can I say "some" in front of "facilitators?
*A lack of a larger, long-term evaluation framework has created a gap. The purpose of the study is to examine 1) factors that contribute to successful implementation of key CPE’s program components, 2) some facilitators and barriers to successful completion of the CPE’s program for students, 3) case management related factors that are predictive of student outcomes, 4) the impact of CPE’s program on student outcomes, and 5) the difference in students’ and mentors’ perception of program quality and integrity before and after change of CPE’s program.
I'm not a teacher. I speak American English. I've tutored writing at the University of Southern Maine and have done a good deal of copy editing and writing, occasionally for publication.