Education
Calculators.org - http://calculators.org
Calculation reference library which helps students figure math and financial problems.
EdnoLand.com - http://www.ednoland.com/
A pre-school community that provides information and various educational resources for both parents and teachers in the classroom.
Number 2 Pencil - http://www.kimberlyswygert.com/
Weblog from a psychometrician. Promotes ideas and research that relates to standardised testing and is aimed at teachers and parents.
World Class Arena - http://www.worldclassarena.org/
From the Department for Education and Skills in the UK. Tries to identify gifted students from around the world with online assessments.