Other
Aircav: Shelters
Informative site explaining what a shelter is and how to best construct a shelter. It also explores the types of shelters possible for construction in a survival setting.
PBS
Pbs Kids: Science Rocks: Build a Tent
This site provides instructions on how to build a tent including materials needed. It focuses primarily on a model tent but gives hints to adapt it to an outdoor tent that could provide shelter from the weather.