How do you text your instructor?

[Karate Dave]

I have a full pull out qwerty keyboard on my phone, so I tend to use full sentences and words. I don't know, I guess I am old fashioned in a way but IDK, B4, and the like coming from an adult just does not impress me, For that matter it doesn't impress me from a teenager either.
To answer your question, I would answer the same way I would in class or any other time that I encountered him. I would also casually drop something about what time I usually eat supper and that family time was important to me. Not in an accusing way or even connecting it to him in any way, just subtle hints. Now as for work, I would just explain respectfully that I have to be selective on when I can reply while I am working as there are times it just isn't appropriate.