Yes, teachers can teach evolution in public schools in the United States. The Supreme Court case *Edwards v. Aguillard* (1987) established a legal precedent against requiring the teaching of creationism alongside evolution. Court rulings consistently uphold the teaching of evolution as a cornerstone of biological science, provided it is presented in a scientific and objective manner. Attempts to restrict the teaching of evolution or mandate the inclusion of non-scientific alternatives have generally been unsuccessful in court.
However, the *how* and *to what extent* evolution is taught can vary depending on the school district, state, and even individual teacher. Some states may have standards that emphasize different aspects of the theory, and teachers have some leeway in their approach within those guidelines. While evolution is a central concept in biology education, the specifics of curriculum and instruction can differ.