Popular Science Activities
I try to make Mathematics more popular and motivate people to learn math by articles, talks, blogs entries, etc. In the past I created I mantained the blog OCM09, dedicated to train students for mathematical Olympiads.
Here are two nice math questions for joy and spare time.
Articles and Talks
List of articles and talks on popular mathematics.
List of Contributions to different mathematical competitions.
Blog about historical events and milestones of mathematics.