What do you think about the correction in punctuation that someone made to my sentence?

As a teacher, I'd be inclined to use the comma. But the rules for commas are so incredibly lax. I looked them all up on a grammar website when I was teaching English to some Koreans and aside from commas in a series and commas after a calendar date, almost every rule has exceptions. My experience has been that people much more frequently overuse them than underuse them. I wouldn't sweat it too much :)

Oh, my God! ANOTHER GRAMMAR QUESTION? You just barely finished asking the first one!

But to answer your question, you do not necessarily need a comma there. It's just something extra that you can put there if you want. A comma would be nice, but it's not necessary.

However, "so incredibly much" is redundant. The "incredibly" is rendered useless by the words "so much." They have basically the same meaning. You do not need a combination of the phrases, as it does not make your message clearer. Instead, all it does is confuse the reader and creates in him or her a feeling of unease. Use either one, not both. Of course, Yahoo does not give an edit option, so it is really pointless to correct you, as you cannot change it even if you wanted to. I just like to lecture!

Since the words "teacher" and "me" refer to the same person a comma should be used. A comma in essence separates words that are really unnecessary. Even though you are a teacher your sentence would have still carried the same meaning if you had simply said This irritates me so incredibly much.

They are correct; you were mistaken. A comma is not like a musical rest, a typographic indication of timing and dramatic presentation. It is used to establish the relationship between elements of a sentence. That you pause when you encounter a comma while reading aloud is a convention of spoken English; that you use a comma to separate dependent clauses in a sentence is a convention of written English.

My favorite guide in these matters is Strunk and White's "The Elements of Style" (yes, I know, it should be italicized, but this isn't possible in Yahoo! Answers). At a mere 85 pages, this book is a gem of condensed elegance and wisdom. The Sources field contains a link to the specific section of "The Elements of Style" dealing with your example. In fact, that section includes the following sentence as an example of the proper use of the comma in separating dependent clauses:

"As I had never been in the place before, I had difficulty in finding my way about."

I highly recommend reading "The Elements of Style," either in online form or on paper. It's a great resource and a surprisingly enjoyable read, containing a good deal of wit and dry good humor along with a concise reference of style, usage and structure.

Are you a teacher?? It doesn't sound like it from the above sentences. What kind of teacher are you?? Not English I can't help but assume.

I can't imagine a teacher using the sentence "so incredibly much."

Anyway - if you're a teacher, why are you asking us about how and where you should be putting commas, shouldn't you know that?

you can also use a comma if you can take a piece out of a sentence. for instance, the sentence could be: this irritates me so incredibly much. the "as a teacher" part could be omited, hence the need for a comma.

The way you wrote it (teacher) is more or less a title or proper name, It is better diction to put a comma between teacher and this.

However it can be correct either way. I think I would have wrote it this way.

This irritates me so much as a teacher,* * * * * * * * * * * * .

I too think there should be a comma after teacher

I'm more worried about the phrase 'so incredibly much.'