I really like the idea of online digital projects. Many years ago, we used paper, envelop and stamps to write pen pals to other students in other cities and states. Collaboration with other students from different states, cultures and countries would offer all students insights that couldn't be gained from textbook-based lessons. Many of our students have a very narrow perception of the world and different cultures. Using technology, students and teachers have access to resources world-wide.
I can readily see the usefullness and benefits in Social Studies and Science.
Students can link to other countries participating in the Summer Olympics.
Students could link with other students in areas of the world with particular current events happening (earthquakes, tsunamis, floods, fires, etc.)