Here's why:
* Appositive Phrase: An appositive phrase is a group of words that renames or describes a noun or pronoun. It is set off by commas.
* The Noun Being Renamed: The noun being renamed is "Mrs. Teachja".
* The Phrase: The phrase "a college instructor owner of a new home in Charlottesville, NC" provides more information about Mrs. Teachja's profession and location.
Therefore, the appositive phrase clarifies who Mrs. Teachja is beyond simply her name.