AulaClic
Aula Clic: Como Descomprimir Un Archivo
This article describes the steps necessary to unzip a file. It has screen shots and a video tutorial.
Goodwill
Gcf Global: Tech Savvy Tips and Tricks
In this tutorial, get tips and tricks to use your devices as efficiently as possible.
Science Bob Pflugfelder
Science Bob: The Exploding Lunch Bag
This site contains a simple procedure for observing an acid-base neutralization reaction (baking soda and vinegar), in which the product, carbon dioxide, causes a zipped bag to explode.