http://mathforum.org/pd/june2010special.html

Now through June 30th, if you purchase a new membership or renew your existing membership in the Problems of the Week at the Class level or higher, you can sign up for any of our Professional Development courses for $70--a savings of $79 off the regular price.

http://www.mathjokes4mathyfolks.com/

G. Patrick Vennebush has compiled a book of math jokes, suitable for all levels. You can read some of the jokes or find out more about the book or its author on this site. Vennebush also collects and creates puzzles, some of which the site also offers. In addition, there's a blog based on the jokes book:

http://mathjokes4mathyfolks.wordpress.com/

http://www.handheldgeometry.co.uk/

Handheld Geometry is a dynamic geometry site offering lessons and challenges for handheld devices and graphing calculators, including the Cabri^TM Jr. Application for the Texas Instruments TI83+ and TI84+, and the TI-Nspire^TM.

We first featured this site last year, noting that author Nevil Hopley offered to make users' contributions into animated movie files. Since then, Hopley has added numerous files, including just such movies. See a list of NSpire resources here:

http://www.calculatorsoftware.co.uk/handheldgeometry/siteindexnspire.htm

http://data.un.org/

The United Nations offers the ability to search across its statistical databases, including:

• education
• human development
• population
• trade
• gender

You can also preview, download, and filter results by sources such as the State of the World's Children (SOWC) and Millennium Development Goals (MDG). The "country data services" list provides one-click access to any nation's statistics agency.