Charlotte,
Wow, your efforts are outstanding! Your students will feel the concern, and care you offer for their success. May I suggest that you give each students a 3x5 card before the class ends. Ask them to write what they learned on one side of the card and put a plus sign (+) on that side of the card. On the other side of the card have them write what was confusing in class or an issues or challenge they are facing right now on the side with a minus (-). This may help them write a message to you while they are still in a safe atmosphere with you.
Arlene Muller