Taking courses at WGU not part of my degree program? And credit by examination

[sciencemathematics1]

They have a masters degree program for the math education. They have less of the educational courses and all of the math courses that I want from the undergraduate program, so it would be easier to get the math credits without taking the educational courses.
https://www.wgu.edu/online-teaching-degr...ogram.html
The question I have is if I would be able to transfer graduate credits to be used in the TESU BA in math undergraduate program. I'm not sure how graduate credits transfer to undergraduate programs.