Here are just a few sites you could use to create some great thinking tasks for students of all ages.
NASA Images of the Day.This a an amazing chance to view very current images from NASA. You can search through the archives or my simply registering your email address have a new image sent to you daily. How good would that be on an IWB?
NATIONAL GEOGRAPHIC for KIDS. National Geographic needs no introduction and their kids site is sensational. BBC for KIDS. There is an amazing range or resources for kids up to 17 on just about any topic you can think of – well worth a look.