This is an official version of the logo of the <a href="https://en.wikipedia.org/wiki/National_Science_Teachers_Association" class="extiw" title="w:National Science Teachers Association">National Science Teachers Association</a> (NSTA), Arlington, Virginia, USA.
<a href="https://en.wikipedia.org/wiki/National_Science_Teachers_Association" class="extiw" title="w:National Science Teachers Association">National Science Teachers Association</a>
<a rel="nofollow" class="external free" href="http://www.nsta.org">http://www.nsta.org</a>