Is there any difference in meaning between these two?
I'll have finished the job before you get home.
I'll have finished the job by the time you get home.
Please note that I'm not a teacher.
(Not a Teacher)
The past perfect tense clarifies and emphasizes the order of past events (namely, this past event occurred before this other past event). Future perfect does the same thing, emphasizing that one future action will take place before another future action.