Answer:
What do you use to hoe a row, slay a foe, and wring with woe?
I am the greatest teacher out of them all, but alas in the end I kill my pupils.
My teeth are sharp, my back is straight, to cut things up it is my fate.
A circle of stones, never in rows. Stacked one on the other, mystery it sows. What is it?
What month of the year has 28 days?
I have two eyes in the front and a lot of eyes on my tail