Used by students in an internship context, with difficulty in reconciling schedules, this tool allowed to share editable files by recording the edit history. This way members of the group can know who edited the shared documents.
Think-Pair-Share means that the students first think individually about a question (or issue, situation, idea, etc) and then share their solution or idea with another students and discuss about it. Finally the results are being discussed in the class.
Dropbox is a service for storing and sharing files. It is based on the concept of "cloud computing".