The Wisconsin Department of Public Instruction, which adopted a strong statement on "Evolution, Creation, and the Science Curriculum" in 1982, revised its statement (document) in 2005.
The statement describes evolution as "a fundamental and important unifying concept in science," explaining, "Evolutionary evidence is found in geologic, meteorological, astronomical, and oceanographic events. Additional evidence is found in paleontology, comparative anatomy, biogeography, embryology, and molecular biology. This broad evolutionary evidence explains why evolution is one of the unifying themes for science."
The department's statement is now reproduced, by permission, on NCSE's website, and will also be contained in the fourth edition of NCSE's Voices for Evolution.