Try to avoid placing students in embarrassing situations, particularly in class. Set up special tutoring sessions and extra classes. Make these activities mandatory, especially for students who are doing poorly. Confer with other faculty members who have the same students in class. Help re-enforce one another.
Team teach a class with a colleague or switch classes for a period or two.
Invite a guest lecturer to class. Use the library reference shelf for some of your old tests and quizzes. Tell the students that you will use some questions from the old tests in their next test. At mid-term and at final exam, your last test question should ask if a student is going to continue at the college or drop out at the end of the semester. If a potential drop-out is identified, you can advise the student to work with the division counselor.