While I will work to reply to emails promptly, you should not expect an immediate response. I will often reply to emails during office hours or at the beginning/end of the day.
I will typically reply to texts a lot quicker than emails. However, make sure you include your NAME in your message so I know who I'm texting.
You can comment on ANY assignment or post. I'll try to reply promptly but this form of communication works a lot like email so don't expect an immediate response.