Do you already know about Brain POP? I just found out about this amazing site and was even happier to see that it is available in Spanish (for those of you who are teaching exclusively in Spanish). This website presents animated, curriculum-based videos, games, activities, and lesson plans for a wide range of subjects. Their collection of Spanish science movies alone is incredible.
You might also check out their newsletters, which are archived on the site (at least back through March of 2008).
Here's a breakdown of the sites:
Brain Pop is for middle- to upper-school students.
Brain Pop Español is a Spanish-only learning site.
Brain POP Jr is geared for children in grades K- 3.
Con mucho cariño...