Rather than competing with the commercial hoopla around Halloween, perhaps we science teachers could do our own special celebrations that relate to science concepts. For example, it's not too early to plan events for Mole Day, celebrated on October 23 (10/23) from 6:02 a.m. to 6:02 p.m. The timing of this event celebrates Avogadro’s number -- 6.02 * 10^23 For more information on the concept of a “mole," enter Avogadro into the SciLinks keyword search. You’ll get a list of websites related to moles and to the work of this scientist.

This day is also used to celebrate the science of chemistry and its applications. The National Mole Day Foundation’s website has background information, themes, and some suggested activities. The American Chemical Society has embedded Mole Day in its National Chemistry Week events. The ACS site has many resources for students and teachers of all grade levels.

The September issue of Learning and Leading with Technology has a product review of handheld digital field recorders to create high quality sound files.

I've read of some websites that are worth a look: Biovisions from Harvard University has video clips and animations related to biology. Learn Bird Songs includes recordings to help you identify common bird by their songs. And Tech How-To: Podcasts has suggestions for creating and hosting original podcasts.

An online conference sponsored by the Smithsonian Institution focuses on the evidence, impact, and response to climate change. It features Smithsonian scientists, curators, and collections examining the issues surrounding climate change from a variety of perspectives. The conference is scheduled for 9/29/2009-10/1/2009 and it will be archived for later use.