While still in the classroom I had used Teacher Tube to post student work.
When I posted this my students felt so proud of their work and enjoyed sharing with their families. It is great validation of student problem based learning.
Since I felt comfortable using YouTube and TeacherTube I thought I'd explore the U.S. Government Tube and found this site that would be great to use with grade level study of ocean life:
With so many of our classrooms having the ActivBoard and projector teachers could project these sites in the classroom and students would feel like they are there. While actual experience is the best this certainly is a great alternative for students who often lack real life experiences and for schools where field trip money is dwindling.