Actually, the real reason biology teachers don't teach magical creationism is because it's childish superstitious nonsense. Biology teachers would rather quit their jobs than be forced to lie to their students about science.
The best biology teachers make evolution a major part of every lesson because evolution (a basic scientific fact) is the foundation of biology. Without evolution biology is as boring as stamp collecting and students learn how to hate science. With evolution as part of every lesson, biology is extremely interesting and students learn how to love science.
Perhaps that's what the scientifically illiterate evolution-denier Ruth Elmer wants, to make students hate science.