Kancho makes me really uncomfortable. How can I stop my students from kanchoing me?
For elementary kids, try telling them how it makes you uncomfortable. They will usually do anything to be your friend, and if you tell them that being kanchoed makes you sad and not want to play with them, they will usually stop. For junior high kids ignoring it is probably best, but that means you will suffer a few strong kanchos before they decide that they are not going to get a reaction out of you. If high school students or adults kancho you, you are on your own.