Although evolution has long been considered a controversial issue, little effort has been made to ensure that instructional approaches address the controversial nature of the issue. A framework for understanding the nature of controversy and some defining characteristics of controversial issues are provided. In light of this framework evolution is evaluated to address the defining characteristics of the issue that make it controversial. The purpose of this exploratory review of evolution instruction is to identify a range of instructional approaches reported in extant literature and to determine the extent to which each approach is commensurate with teaching evolution as a controversial issue.

High school science students are often unwilling to learn about evolution due to a perceived conflict with their religious beliefs. Other students are able to understand evolution despite the fact that they do not believe in evolution. According to Cobern (Sci Educ 80:579-610, 1996), students can wall off that which is believed from that which is not believed in a process he called cognitive apartheid. A mixed-methods study was conducted to determine the extent to which understanding of evolution differed among high school Advanced Placement science students who did and did not believe in evolution. Two students who demonstrate a sophisticated understanding of evolution despite their admonition that they do not believe in evolution were then interviewed. Eight themes emerged from the interview that provide insight into the views of students learning of evolution despite the fact that they do not believe in evolution. Based on these themes, several implications for the teaching of evolution are presented.

In order to effectively teach evolution to all students, even those resistant to learning evolution, science teachers may question the extent to which religion can legally be discussed in the public high school science classroom. Evolution is taught from a variety of approaches, each of which has legal implications. Four approaches to teaching socioscientific issues like evolution are provided, along with the legal implications of enacting each approach.

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