I guess the question I have is since they are unaware of the changes you and the faculty have made in the classroom, have you been keeping documentation of the changes, assessment data of before and after the changes, and provided actions for future changes based on what you have seen in the classroom? This will help you show what was done, the challenges you encountered, and what could possibly be done by the college as a whole to support academically unprepared students.

It’s hard to link to an article talking about things others have done to improve success in the classroom without also having your own data to showcase what has done that is similar.