Scenario #1 – Use a Synchronous tool
A student has an essay due tomorrow and has a last-minute question to help. Obviously, a synchronous tool (i.e., Google Hangouts) would be best for this scenario, so that the teacher could answer the student’s question immediately, and the student would be able to submit the assignment on time.
Having said that, I think it would be unfair to expect a teacher to always be available to answer questions immediately on the night or day before an assignment is due. However, perhaps a teacher could plan ahead and build-in an occasional Google Hangout within the last day or two before a major assignment is due.
Scenario #2 – Use an Asynchronous tool
After the first 2 weeks in an eLearning course, a teacher wants to gather feedback from the class on how they are doing so far. An asynchronous tool (i.e., Google Forms) could be used to gather the information over a short period of time.