"Now, at last, technology is catching up to virtual field trips' possibilities. A new generation of trips is merging highly interactive Web sites with engaging storytelling, vibrant art, and curricula tied to national standards, creating a compelling way to explore the natural world without leaving campus.
Here are our top four picks -- and you can't beat the admission price: free."
A field trip created with TourMaker guides you through a sequence of Web pages on any given topic. For each page, there is simultaneous commentary in an accompanying frame. You move forward and back through the Field Trip using the tour Control Panel and you can leave the Tour to explore links and return to it whenever you want.