Cycle of Research and Development, from <a rel="nofollow" class="external text" href="http://www.nsf.gov/pubs/2009/nsf09601/nsf09601.htm?govDel=USNSF_29">"Research and Evaluation on Education in Science and Engineering (REESE), Program Solicitation NSF 09-601"</a>
<a href="https://en.wikipedia.org/wiki/National_Science_Foundation" class="extiw" title="w:National Science Foundation">National Science Foundation</a>
Last Updated: 11/07/06" but modification date is "Fri 31 Jul 2009 10:33:08 PM PDT
<a rel="nofollow" class="external text" href="http://www.nsf.gov/pubs/2009/nsf09601/nsf09601.htm?govDel=USNSF_29">"Research and Evaluation on Education in Science and Engineering (REESE), Program Solicitation NSF 09-601"</a>