29/8/07 - Would be excellent for upper KS2 children or ICT clubs. Create videos using better special effects than Windows Movie Maker - most of the work is done automatically by the site! Basic accounts are free.
26/6/07 - For personal subject knowledge or perhaps to stretch G&T in Y5/6. It has cogent explanations of some more advanced concepts and deals with some of the history of mathematics in an interesting way.
4/10/07 - "Newspapers have a long tradition in bringing the news to the masses. MTN brings together resources, useful Links, activities, news feeds and an online publishing system"
An American site with a lots of different ideas for teaching a range of mathematical concepts. Thinking games, maths in art and D&T, maths across the curriculum. A great site.