External Links on Popularisation and Teaching

What do mathematicians do? by Jon Berrick, National University of Singapore

Where Mathematics Comes From: How the Embodied Mind Brings Mathematics into Being, by George Lakoff & Rafael E. Núñez
Review of this book

The n-category cafe  This is not strictly speaking on popularisation and teaching, but more on the area of higher dimensional algebra, a big development in the 21st century.

Mathematics under the Microscope , link to Alexander Borovik's book and blog