That has been change and revised how many times? What about all the people taught "wrongly" did they all of sudden drop to the floor and die?
Best not teach Newtonian or Einsteinian mechanics then, either. Clue for the clueless. Revisions of scientific theories don't tend to completely overturn the knowledge that went before.
I'd also be interested in knowing what significant part of the theory of evolution has been overturned or found to be incorrect in the last 100 years. Mendelian genetics and molecular biology have enormously strengthened the theory with additional confirming data about mechanism and numerous further successful predictions about the molecular and genetic data derived from evolutionary theory, true, but they didn't make what was previously known wrong; they simply added detail.