Here is search logs of 650,000 AOL users. It's very interesting to view search history of particular person and analyze his personality. Let's do it together! Read more about AOL search database scandal or view research papers on web searching.
Matematicas.net
Aquí encontrarás apuntes, ejercicios, exámenes, juegos, enlaces e historia. Todo este material está muy orientado para la enseñanza media y superior.