I've been doing this for the 3 years that I've been teaching and I've never had a problem. (Okay, I once had a parent who happened to live down the block from me knock on my door to talk to me about her son, but that wasn't because I gave out my cell number.) Parents often work and can't reach me during school hours. Plus, I frequently call parents in the evenings from home so they have my number on their caller ID anyway. Some teachers are telling me that I'm making a big mistake and parents will misuse my number in some way. What do you think?