Much depends on their level. I started out the first hour with this...which I will attach. It's developed using the official Korean Ministry of Culture's Rules for Romanization (with a few of my own customizations added that are in addition to, not in place of, the KMOC's). From this PowerPoint, you can have them make nametags. Read through it first and replace my name with yours. I'll attach a document for nametags with some basic "getting to know" questions, and you can toss in a cultural note like I did about how Koreans ask personal questions whereas in the west (ie: Canada, where I'm from, we say and ask more trivial things "small talk" to people whom we're just meeting). You can also add more words for them to spell, and toss in some Konglish as well. As I say, much depends on their level. This is a little like a level assessment though, in some way.