"Hi, Ms. S, it's me Margo. I just had a few question about the natural logarithm problems... I was doing fine until I got to those."
"Ok, I'm on the phone with my mom, let me cal you back."
Ten minutes later.
"Hi Margo, it's me Emily. Err, I mean Ms. S"
And we proceed to discuss her math homework for 10 minutes. Yes, I gave out my phone number to students, but only to my higher level class with strict instructions not to call past 9. But I love it, I'm so happy to have students who care enough to ask about problems that they don't understand. It's such a joy. And actually Margo and Ichi are both heading off on visa runs and have asked me for the assingments they'll be missing so maybe I should figure that out...