First provide all these Scriptures that say the earth is, in fact, flat.
Here's few verses:
"The earth takes shape like clay under a seal." (Job 38:14)
Clay under a seal is not round it's flat.
"The visions of my head as I lay in bed were these: I saw, and behold, a tree in the midst of the earth; and its height was great. The tree grew and became strong, and its top reached to heaven, and it was visible to the end of the whole earth. (Daniel 4:10-11)"
"The "whole" earth? No matter how tall the tree was, even if it was only a dream, it would not have been visible from the other side of the earth, unless the earth was flat.
Revelations 7:1 states the Earth has four corners,
"take the earth by the edges and shake the wicked out of it (Job 38:12-13)
How could the earth be held by its "edges"? A sphere has no edges.
For those interested in literal interpretation, these few verse alone give you enough room to say the "earth" is flat, the only way around it, I see, is by assuming the verses are "allegorical" interpretations of the earth.
Here an extensive list of verses, that support geocentrism, and a flat-earth:
http://hypertextbook.com/eworld/geocentric.shtml
Believers who hold a flat-earth position are literalist, and that is the only reason they hold that position, the only difference is that they are a more fiery-breed of literalist, than the luke-warm YEC type, there is no doubt about this, if they were not literalist then the shape of earth, would be a question of no consequence. They see verses as those mentioned above as literal, and these verses can only be interpreted in one way from a literal perspective. Any scientific "theory" and natural evidence that disputes this is false, or forged by naturalist scientist who want to discredit the word of god.
We must teach our children to take the verses as literal, if we teach them otherwise, we are setting them up to follow false doctrines, because it will not be long, before they say the resurrection was allegorical, or God forbid they become democrats!
We must teach them the majority of scientist have either been deceived, or are deceivers, and that there is a large conspiracy to replace the word of God, with a naturalistic religion!
Did I make my point yet?
now, i'll wait for the YEC responses.