I had a shy and studious Muslim girl in class last term (head-scarf, no veil). It was a multi-hour evening class, so I gave them a break mid-way. She wanted to do her prayers then and asked if I knew a quiet place, so I unlocked the computer lab, and pointed out the compass directions. It became a daily routine, and one day when she left her mat behind, I made sure to pick it up before it vanished and gave it to her the next day, got profuse thanks. When we were discussing correlation and lines of "best fit" I mentioned that I wished that I had multiple colors of chalk so I could distinguish the various types of lines and points I was talking about. At the end of the term, she gave me a box of chalk, in all different colors. That was nice (no, she didn't need to "bribe" me, her A was quite solid!)