These days, tattoos are becoming the norm, and it's getting to the point where more people have them than those who don't. I don't think teachers should be discriminated against for having tattoos, however, I do think that tattoos should, at least, be tastefully done. For example, I don't think it's appropriate for a teacher to be walking around a school with gang symbols all over their face. Teachers are setting an example for the children in their schools. In a nutshell, if you know you are planning to have a career as a teacher, be mindful about how you decorate your body, because little eyes are watching and little minds are very impressionable.
Many kids want tatoos early and many parents for obvious reasons refuse. I tend to think if your going to make teaching a career and particularly if your teaching a K-8.... Wearing them where they can be covered up. At some point you will have a parent upset that your sporting a tatoo encouraging children to get them.
I'd say any number or size of tattoos are fine so long as any visible tattoos aren't too vulgar or provocative.
I would say yes, as long as they are modest and tasteful. Teachers are supposed to look professional. :)
What about the students? ^.-