This organization hosts electronic field trips with four main parts: the trip, journal, the virtual visit (a streaming video), an Ask the expert tool, and a hosted web chat.
Shedd Aquarium in Chicago has a great collection of interactive learning activities. The activities are categorized according to grade level and vary in format. Some of the interactive activities are like video games (Squish the Fish for 1st graders) while others are more like virtual scavenger hunts (Conservation Investigation). The games and virtual scavenger hunts could easily take students an hour or longer to complete and the students would learn something new throughout the activity. In addition to the interactive activities, Shedd Aquarium provides a host of great Marine Science lesson plans for grades K-12.
Lovely provides a hot-linked list organized into live journeys, "interactive environments," travelogues, e-museums, building and place tours, map-based visits, and read-along visits.
There is a free trial version of the materials in the National Library of virtual manipulatives. Math topics Numbers and Operations, Algebra, Geometry, Measurement and Data Analysis & Probablity are covered. I did not come across anything asking for money so I a not certain there is a cost. There are tons of manipulatives to access from each of the above categories. This site is associated with the Uta State University.
"JumpStart is a magical online world packed with friends, games and adventures!
From training dragons to exploring lost islands, JumpStart.com includes
thousands of games and activities for kids ages 3-12. But what really sets
JumpStart apart is our commitment to education. We believe that learning should
be an adventure, not a chore. That's why the games at JumpStart.com are
specially designed to make math, reading and critical thinking fun! After all,
there's no stopping a kid with a JumpStart!"
With Google Earth, you can create awesome tours, taking viewers on a virtual trip from place to place. You can enhance your tours with narration, images, videos, text, and other types of information. The tours you create can even be embedded into a website.
With a view of travel as an educational experience like no other, the project makes use of digital media to promote an understanding of different culture and customs to students worldwide. The site hosts virtual field trips to England, Jordan, and South Africa that include more than 160 fort films that correspond to the destinations. Each video explains more about the region's food, music, culture, and language. Since 2003, project explorer has counted more than a million visitors to the site from more than 40 different countries. Recently, it won a Parents' Choice Award for "Outstanding Web Programming." The site's developers qre not working to add a fourth field trip--this one to Malaysia--the Project Explorer has lesson for upper elementary, middle and high school. They plan to offer lesson specifically designed for the early grades.