The goal of the Research Experiences for Teachers (RET) activity is to enhance the professional development of K-12 science educators through research experiences at the emerging frontiers of science in order to bring new knowledge into the classroom. BIO strongly encourages all of its grantees to make special efforts to identify talented teachers who can participate in this RET activity to integrate research and education. This special opportunity is the same opportunity that is specified in the Research Experiences for Undergraduates (REU) solicitation. We believe that encouraging active participation of teachers in on-going NSF projects is an excellent way to strengthen the scientific expertise of our nation’s teachers. Another goal of the RET supplement activity is to build collaborative relationships between K-12 science educators and the NSF research community. BIO is particularly interested in encouraging its researchers to build mutually rewarding partnerships with teachers at urban or rural schools and those in school districts with limited resources. Before submitting an RET request (as part of a new or renewal NSF proposal or as a supplemental funding request to an existing NSF award), we strongly encourage the Principal Investigator to initiate a conversation via email or phone with the program director of his/her particular NSF award, or the cognizant program director for the program to which s/he is submitting a proposal.