Needs to maintain customer and instructor information.
Instructor availability, instructor clock in/out, appointments with customers, and type of appointment - group or individual. Appointments should have a tag that can be tagged (such as type of dance). We should be able to ask questions like
Are there any foxtrot classes next week?
Which customers' birthday are this week?
When is the next time Susan is teaching waltz?
What is Frank's availability next week for lessons?
It is best if the app is in JSP Flex or other web framework.