Researchers found that only 28 percent of biology teachers consistently follow the recommendations of the National Research Council to describe straightforwardly the evidence for evolution and explain the ways in which it is a unifying theme in all of biology. At the other extreme, 13 percent explicitly advocate creationism, and spend at least an hour of class time presenting it in a positive light.
That leaves what the authors call “the cautious 60 percent,” who avoid controversy by endorsing neither evolution nor its unscientific alternatives. In various ways, they compromise.
“These kinds of data have been reported regionally, and in some cases nationally, for decades. Creationists are in the classroom, and it’s not just the South,” he said. “At least 25 percent of high school teachers in Minnesota explicitly teach creationism.” “These courses aren’t reaching the creationists,” he said. “They already know what evolution is. They were biology majors, or former biology students. They just reject what we told them.
“With 15 to 20 percent of biology teachers teaching creationism,” he continued, “this is the biggest failure in science education. There’s no other field where teachers reject the foundations of their science like they do in biology.” - Randy Moore, a professor of biology at the University of Minnesota
“Students are being cheated out of a rich science education.” - Dr. Plutzer, a professor of political science at Penn State University
On Evolution, Biology Teachers Stray From Lesson Plan - NYTimes