Web Albums

Web albums like Picasa and online presentation like Google Presentations are extremely useful for a teacher who may have several computers on which work is done, and does not want to keep a flash drive with all materials on it. This way, any presentations made for class can be stored online and accessed from any computer.
The digital photo hunts were good activities for upper level (middle/high school) students to do, and perhaps to create a digital portfolio. Otherwise, both activities are good to use as presentations for younger grades, so they are able to access them  in more ways than just watching at the front of the class. Teachers can embed these presentations into websites so students can later look at them.

Resource Wiki

The resource wiki collection we put together in class was extremely vast. It's good to have as many people as possible contribution to a resource wiki if you really want a comprehensive source to pull from. One teacher may have to teach several different subject areas and not be totally familiar with all of them - this is a good way for the teacher to prepare. Resource wikis are also great go-tos for when you need a sub in your class and have no lesson plan prepared.