I don't care if he's teaching arithmetic.
If he's being laughed at, ignored, misquoted, thought of as a troll, supertroll, liar, deceiver, or just plain wrong; the students are not going to learn anything.
In this thread and the two others ("Adam and Eve" & "A question") you've not been ignored, you've never been misquoted, the participants don't for a minute think you're a troll or supertroll, and certainly don't think you're a liar or out to intentionally deceive. So what does that leave? Yep! You're just plain WRONG!
Adam and Eve, as first-created human beings, never existed. They are mythical beings originating in the mists of time from people who lacked scientific knowledge yet who tried to imagine how they came into being and where they had come from. So trying to date the world using genealogies based on Adam's creation is a hopeless endeavour.
Embedded age - AV style - is a desperate attempt to make this bronze-age dating fit modern scientifically measured ages for the Earth and universe and, for the aforementioned reasons, is also a hopeless endeavour. Moreover, as has been pointed out, it is internally inconsistent and falls flat on its face trying to explain the dates of geological formations, fossils and the distance and age of stars.
However, for those who
do believe in Adam and Eve
and in a young earth. and who may also be interested in embedded age, I would recommend Gosse's
Omphalos hypothesis, which is a much better alternative — one that is internally consistent and which explains not only
why God might have embedded age and history into the world, but also
how the Earth is in the condition we see it today.