Tutoring

I start tutoring again next week through a local DC program called Higher Achievement.

I assume I'll be using their literature teaching plan, although, I could be assigned to the culture component. Someone will tell me tomorrow night which I'm doing.

The thing is, I'm not used to using lesson plans. Even when I tutored college kids in Belgium, I prepared my own lesson plans, but often found them going out the window as I responded to questions based on their official assignments.

So far, I've only been able to look at the first assignment. One of the things this program is trying to teach kids is the usefulness of formal language.

One thing that occurs to me is there are many types of informal language and that most of us do a certain amount of code switching as we move from one arena to another. Based on the opening assignment, I've come up with the following words and phrases:
pidgin
slang
cant
dialect
patois
mother tongue



What words would you use to indicate informal language? Do you have any words to indicate formal usage?