We are trying to figure out a way for students to send files to us without using email. For instance, we would like our students to be able to send to the teacher a powerpoint presentation or maybe a .jpeg they are working on in class. I realize there are wikis available, unfortunately, it allows for students to access other student work. Has anyone found a free service that would allow students to upload work to the teacher without other students being able to view it? It appears there are many services available to send work to students, but no way for teachers to receive the work back in digital form.