Teacher, is this sentence okay?
I will not be coming in late tomorrow and will work my normal hours 9 am to 5 p.m.
I suggest "my normal hours of 9 am to 5 pm" or "my normal hours: 9 am to 5 pm" instead. But that could just be American use.
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.
Remember - if you don't use correct capitalisation, punctuation and spacing, anything you write will be incorrect.